Exchange In The 231 Area Code & Phone Companies That Support Them
- 231-363 Michigan - Telnet Worldwide, Inc.
- 231-610 Michigan - Arch Wireless Holdings, Inc.
- 231-236 Michigan - Telnet Worldwide, Inc.
- 231-348 Michigan - Michigan Bell Tel Co - Mi
- 231-833 Michigan - Dobson Cellular Systems
- 231-899 Michigan - Local Exchange Carriers Of Mic
- 231-890 Michigan - Michigan Bell Tel Co - Mi
- 231-339 Michigan - American Messaging (am), Inc.
- 231-933 Michigan - Michigan Bell Tel Co - Mi
- 231-629 Michigan - Nextel Communications
- 231-744 Michigan - Verizon North Inc. - Mi
- 231-384 Michigan - Alltel Communications
- 231-498 Michigan - Level 3 Communications
- 231-221 Michigan - Michigan Bell Tel Co - Mi
- 231-269 Michigan - Ace Tel Co Of Michigan Inc
- 231-896 Michigan - Lucre, Inc.
- 231-762 Michigan - Upper Peninsula Tel Co
- 231-580 Michigan - Long Distance Of Michigan
- 231-594 Michigan - Lucre, Inc.
- 231-249 Michigan - Lucre, Inc.
- 231-889 Michigan - Michigan Bell Tel Co Mi
- 231-689 Michigan - Michigan Bell Tel Co Mi
- 231-723 Michigan - Michigan Bell Tel Co - Mi
- 231-510 Michigan - Dobson Cellular Systems, Inc.
- 231-590 Michigan - Alltel Communications, Inc.
- 231-597 Michigan - Michigan Bell Tel Co Mi
- 231-682 Michigan - Telnet Worldwide, Inc.
- 231-208 Michigan - Telnet Worldwide, Inc.
- 231-349 Michigan - Alltel Communications, Inc.
- 231-369 Michigan - Ace Tel Co Of Michigan Inc
- 231-929 Michigan - Michigan Bell Tel Co - Mi
- 231-408 Michigan - Centennial Michiana License Co
- 231-726 Michigan - Verizon North Inc Mi
- 231-674 Michigan - Level 3 Communications
- 231-885 Michigan - Ace Tel Co Of Michigan Inc
- 231-639 Michigan - Local Exchange Carriers Of Mic
- 231-646 Michigan - Verizon North Inc Mi
- 231-686 Michigan - Local Exchange Carriers Of Mic
- 231-512 Michigan - American Messaging (am), Inc.
- 231-223 Michigan - Peninsula Tel Co
- 231-556 Michigan - Lucre, Inc.
- 231-303 Michigan - Arch Wireless Holdings, Inc.
- 231-353 Michigan - Telnet Worldwide, Inc.
- 231-527 Michigan - Michigan Bell Tel Co - Mi
- 231-346 Michigan - Telnet Worldwide, Inc.
- 231-224 Michigan - Lucre
- 231-395 Michigan - Telnet Worldwide, Inc.
- 231-313 Michigan - Dobson Cellular Systems, Inc.
- 231-681 Michigan - Verizon North Inc Mi
- 231-441 Michigan - Local Exchange Carriers Of Mic
- 231-555 Michigan - Michigan Bell Tel Co
- 231-438 Michigan - Lucre, Inc.
- 231-286 Michigan - Cellco Partnership Dba Verizon
- 231-884 Michigan - Dobson Cellular Systems, Inc.
- 231-564 Michigan - Dobson Cellular Systems, Inc.
- 231-670 Michigan - Cellco Partnership Dba Verizon
- 231-627 Michigan - Michigan Bell Tel Co - Mi
- 231-668 Michigan - Long Distance Of Michigan
- 231-863 Michigan - Lucre, Inc.
- 231-712 Michigan - American Messaging (am), Inc.
- 231-803 Michigan - Kmc Telecom V
- 231-494 Michigan - American Messaging (am), Inc.
- 231-930 Michigan - Kmc Telecom V
- 231-709 Michigan - Dobson Cellular Systems, Inc.
- 231-864 Michigan - Centurytel Of Michigan, Inc.
- 231-883 Michigan - Dobson Cellular Systems, Inc.
- 231-852 Michigan - Dobson Cellular Systems, Inc.
- 231-625 Michigan - Michigan Bell Tel Co Mi
- 231-916 Michigan - Level 3 Communications
- 231-436 Michigan - Acd Telecom
- 231-683 Michigan - Level 3 Communications
- 231-432 Michigan - Dobson Cellular Systems
- 231-372 Michigan - Telnet Worldwide, Inc.
- 231-425 Michigan - Nextel Communications
- 231-656 Michigan - Local Exchange Carriers Of Mic
- 231-633 Michigan - Dobson Cellular Systems, Inc.
- 231-204 Michigan - Arch Wireless Holdings, Inc.
- 231-799 Michigan - Verizon North Inc Mi
- 231-503 Michigan - Arch Wireless Holdings, Inc.
- 231-981 Michigan - Level 3 Communications
- 231-769 Michigan - Verizon North Inc Mi
- 231-394 Michigan - Alltel Communications, Inc.
- 231-642 Michigan - Nextel Communications, Inc.
- 231-532 Michigan - American Messaging (am), Inc.
- 231-859 Michigan - Kaleva Tel Co
- 231-912 Michigan - Dobson Cellular Systems, Inc.
- 231-719 Michigan - Verizon North Inc Mi
- 231-515 Michigan - Talk America Inc Mi
- 231-995 Michigan - Michigan Bell Tel Co - Mi
- 231-760 Michigan - Centennial Michiana License Co
- 231-790 Michigan - Long Distance Of Michigan
- 231-672 Michigan - At+t Local
- 231-741 Michigan - Lucre, Inc.
- 231-334 Michigan - Centurytel Of Michigan, Inc.
- 231-943 Michigan - Michigan Bell Tel Co Mi
- 231-834 Michigan - Michigan Bell Tel Co Mi
- 231-647 Michigan - Telnet Worldwide, Inc.
- 231-652 Michigan - Sprint Spectrum L P Mi
- 231-333 Michigan - Level 3 Communications
- 231-320 Michigan - Verizon North Inc. - Mi
- 231-240 Michigan - Telnet Worldwide, Inc.
- 231-535 Michigan - Level 3 Communications
- 231-599 Michigan - Acd Telecom
- 231-591 Michigan - Michigan Bell Tel Co - Mi
- 231-301 Michigan - Cellco Partnership Dba Verizon
- 231-877 Michigan - Lucre, Inc.
- 231-399 Michigan - Charter Fiberlink Michigan
- 231-337 Michigan - Lucre, Inc.
- 231-796 Michigan - Michigan Bell Tel Co - Mi
- 231-848 Michigan - Kaleva Tel Co
- 231-262 Michigan - Acd Telecom, Inc. - Mi
- 231-352 Michigan - Level 3 Communications
- 231-529 Michigan - Centurytel Of Michigan, Inc.
- 231-622 Michigan - Acd Telecom
- 231-508 Michigan - Kaleva Tel Co
- 231-386 Michigan - Michigan Bell Tel Co
- 231-768 Michigan - Michigan Bell Tel Co Mi
- 231-343 Michigan - Sprint Spectrum L.p.- Mi
- 231-865 Michigan - Verizon North Inc Mi
- 231-215 Michigan - Cellco Partnership Dba Verizon
- 231-424 Michigan - Acd Telecom, Inc. - Mi
- 231-499 Michigan - Alltel Communications, Inc.
- 231-843 Michigan - Verizon North Inc. - Mi
- 231-341 Michigan - American Messaging (am), Inc.
- 231-316 Michigan - Telnet Worldwide, Inc.
- 231-340 Michigan - Alltel Communications, Inc.
- 231-463 Michigan - Sprint Communications Company
- 231-457 Michigan - Acd Telecom
- 231-628 Michigan - American Messaging (am), Inc.
- 231-974 Michigan - Local Exchange Carriers Of Mic
- 231-318 Michigan - Arch Wireless Holdings, Inc.
- 231-816 Michigan - Level 3 Communications
- 231-872 Michigan - Dobson Cellular Systems, Inc.
- 231-648 Michigan - Lucre
- 231-606 Michigan - Arch Wireless Holdings, Inc.
- 231-821 Michigan - Verizon North Inc Mi
- 231-582 Michigan - Michigan Bell Tel Co - Mi
- 231-757 Michigan - Michigan Bell Tel Co Mi
- 231-624 Michigan - Nextel Communications, Inc.
- 231-288 Michigan - New Cingular Wireless Pcs
- 231-305 Michigan - Telnet Worldwide, Inc.
- 231-869 Michigan - Verizon North Inc Mi
- 231-894 Michigan - Charter Fiberlink Michigan
- 231-785 Michigan - Lucre, Inc.
- 231-875 Michigan - Lucre, Inc.
- 231-638 Michigan - Nextel Communications, Inc.
- 231-835 Michigan - Dobson Cellular Systems
- 231-774 Michigan - Telnet Worldwide
- 231-404 Michigan - Centennial Michiana License Co
- 231-382 Michigan - American Messaging (am), Inc.
- 231-640 Michigan - Dobson Cellular Systems
- 231-258 Michigan - Michigan Bell Tel Co - Mi
- 231-462 Michigan - Acd Telecom
- 231-874 Michigan - Local Exchange Carriers Of Mic
- 231-361 Michigan - Telnet Worldwide, Inc.
- 231-237 Michigan - Michigan Bell Tel Co Mi
- 231-693 Michigan - Lucre, Inc.
- 231-522 Michigan - Lucre, Inc.
- 231-694 Michigan - Lucre, Inc.
- 231-239 Michigan - Centurytel Wireless
- 231-651 Michigan - Dobson Cellular Systems
- 231-492 Michigan - Alltel Communications
- 231-649 Michigan - Alltel Communications, Inc.
- 231-539 Michigan - Michigan Bell Tel Co Mi
- 231-322 Michigan - Acd Telecom
- 231-729 Michigan - Dobson Cellular Systems
- 231-302 Michigan - Lucre, Inc.
- 231-235 Michigan - Telnet Worldwide, Inc.
- 231-229 Michigan - Centurytel Of Michigan, Inc.
- 231-764 Michigan - Telnet Worldwide, Inc.
- 231-342 Michigan - Alltel Communications, Inc.
- 231-615 Michigan - American Messaging (am), Inc.
- 231-514 Michigan - American Messaging (am), Inc.
- 231-731 Michigan - Lucre, Inc.
- 231-317 Michigan - Arch Wireless Holdings, Inc.
- 231-743 Michigan - Michigan Bell Tel Co Mi
- 231-962 Michigan - Lucre, Inc.
- 231-645 Michigan - Dobson Cellular Systems, Inc.
- 231-537 Michigan - Centurytel Of Michigan, Inc.
- 231-862 Michigan - Ace Tel Co Of Michigan Inc
- 231-366 Michigan - Acd Telecom
- 231-745 Michigan - Michigan Bell Tel Co - Mi
- 231-720 Michigan - Level 3 Communications
- 231-586 Michigan - Nationsline Michigan, Inc. - M
- 231-907 Michigan - Dobson Cellular Systems, Inc.
- 231-823 Michigan - Verizon North Inc Mi
- 231-519 Michigan - Alltel Communications, Inc.
- 231-275 Michigan - Centurytel Of Michigan, Inc.
- 231-217 Michigan - Telnet Worldwide, Inc.
- 231-944 Michigan - Cynergycomm Net
- 231-536 Michigan - Michigan Bell Tel Co Mi
- 231-414 Michigan - Dobson Cellular Systems
- 231-634 Michigan - Island Tel Co
- 231-824 Michigan - Level 3 Communications
- 231-876 Michigan - Michigan Bell Tel Co - Mi
- 231-779 Michigan - Michigan Bell Tel Co - Mi
- 231-641 Michigan - Centurytel Acquisition, Llc Db
- 231-445 Michigan - Alltel Communications
- 231-789 Michigan - Lucre, Inc.
- 231-660 Michigan - Local Exchange Carriers Of Mic
- 231-336 Michigan - Arch Wireless Holdings, Inc.
- 231-465 Michigan - Centennial Michiana License Co
- 231-525 Michigan - Level 3 Communications
- 231-207 Michigan - Telnet Worldwide, Inc.
- 231-635 Michigan - Local Exchange Carriers Of Mic
- 231-282 Michigan - Cellco Partnership Dba Verizon
- 231-598 Michigan - Centennial Michiana License Co
- 231-736 Michigan - Verizon North Inc Mi
- 231-733 Michigan - Verizon North Inc. - Mi
- 231-882 Michigan - Michigan Bell Tel Co - Mi
- 231-356 Michigan - Telnet Worldwide, Inc.
- 231-250 Michigan - Alltel Communications, Inc.
- 231-735 Michigan - Alltel Communications, Inc.
- 231-920 Michigan - Dobson Cellular Systems, Inc.
- 231-331 Michigan - Acd Telecom
- 231-230 Michigan - Telnet Worldwide, Inc.
- 231-557 Michigan - Cellco Partnership Dba Verizon
- 231-480 Michigan - Level 3 Communications
- 231-753 Michigan - Long Distance Of Michigan
- 231-329 Michigan - Alltel Communications, Inc.
- 231-886 Michigan - Dobson Cellular Systems, Inc.
- 231-227 Michigan - Alltel Communications, Inc.
- 231-677 Michigan - Carr Tel Co
- 231-832 Michigan - Michigan Bell Tel Co - Mi
- 231-782 Michigan - Local Exchange Carriers Of Mic
- 231-477 Michigan - Kaleva Tel Co
- 231-938 Michigan - Michigan Bell Tel Co - Mi
- 231-228 Michigan - Centurytel Of Michigan, Inc.
- 231-881 Michigan - Dobson Cellular Systems, Inc.
- 231-201 Michigan - Centennial Michiana License Co
- 231-314 Michigan - Telnet Worldwide, Inc.
- 231-429 Michigan - Centurytel Wireless, Inc.-mi
- 231-587 Michigan - Michigan Bell Tel Co - Mi
- 231-826 Michigan - Century Telephone Of Northern
- 231-538 Michigan - Local Exchange Carriers Of Mic
- 231-887 Michigan - Dobson Cellular Systems
- 231-486 Michigan - Brooks Fiber Communications Of
- 231-206 Michigan - Nextel Communications, Inc.
- 231-271 Michigan - Centurytel Of Michigan, Inc.
- 231-724 Michigan - Verizon North Inc Mi
- 231-925 Michigan - Local Exchange Carriers Of Mic
- 231-459 Michigan - Acd Telecom
- 231-543 Michigan - Lucre, Inc.
- 231-338 Michigan - Lucre, Inc.
- 231-794 Michigan - Dobson Cellular Systems
- 231-355 Michigan - Telnet Worldwide, Inc.
- 231-725 Michigan - Verizon North Inc Mi
- 231-805 Michigan - Acd Telecom, Inc. - Mi
- 231-846 Michigan - Nextel Communications
- 231-614 Michigan - Lucre, Inc.
- 231-526 Michigan - Michigan Bell Tel Co - Mi
- 231-202 Michigan - Centennial Michiana License Co
- 231-773 Michigan - Verizon North Inc. - Mi
- 231-754 Michigan - Lucre, Inc.
- 231-468 Michigan - Acd Telecom
- 231-325 Michigan - Centurytel Of Michigan, Inc.
- 231-970 Michigan - Dobson Cellular Systems
- 231-697 Michigan - Lucre, Inc.
- 231-569 Michigan - American Messaging (am), Inc.
- 231-908 Michigan - Local Exchange Carriers Of Mic
- 231-378 Michigan - Ace Tel Co Of Michigan Inc
- 231-263 Michigan - Century Telephone Of Northern
- 231-856 Michigan - Michigan Bell Tel Co Mi
- 231-776 Michigan - Local Exchange Carriers Of Mic
- 231-644 Michigan - Lucre, Inc.
- 231-747 Michigan - Nextel Communications
- 231-548 Michigan - Centurytel Of Michigan, Inc.
- 231-319 Michigan - Telnet Worldwide, Inc.
- 231-428 Michigan - Arch Wireless Holdings, Inc.
- 231-354 Michigan - Talk America Inc Mi
- 231-715 Michigan - Dobson Cellular Systems, Inc.
- 231-830 Michigan - Verizon North Inc Mi
- 231-307 Michigan - Centennial Michiana License Co
- 231-563 Michigan - Lucre
- 231-268 Michigan - Centurytel Wireless
- 231-839 Michigan - Centurytel Of Michigan, Inc.
- 231-416 Michigan - American Messaging (am), Inc.
- 231-675 Michigan - Dobson Cellular Systems, Inc.
- 231-936 Michigan - Long Distance Of Michigan
- 231-287 Michigan - Centurytel Wireless, Inc.-mi
- 231-941 Michigan - Michigan Bell Tel Co - Mi
- 231-994 Michigan - Telnet Worldwide
- 231-452 Michigan - Lucre
- 231-312 Michigan - Telnet Worldwide, Inc.
- 231-766 Michigan - Verizon North Inc Mi
- 231-792 Michigan - Local Exchange Carriers Of Mic
- 231-544 Michigan - Acd Telecom
- 231-460 Michigan - Lucre
- 231-873 Michigan - Verizon North Inc. - Mi
- 231-608 Michigan - Arch Wireless Holdings, Inc.
- 231-698 Michigan - Lucre, Inc.
- 231-583 Michigan - Local Exchange Carriers Of Mic
- 231-643 Michigan - Local Exchange Carriers Of Mic
- 231-448 Michigan - Island Tel Co
- 231-365 Michigan - Telnet Worldwide, Inc.
- 231-604 Michigan - Arch Wireless Holdings, Inc.
- 231-226 Michigan - Telnet Worldwide, Inc.
- 231-350 Michigan - Alltel Communications
- 231-798 Michigan - Verizon North Inc Mi
- 231-931 Michigan - Arch Wireless Holdings, Inc.
- 231-678 Michigan - Acd Telecom, Inc. - Mi
- 231-487 Michigan - Michigan Bell Tel Co - Mi
- 231-637 Michigan - Telnet Worldwide, Inc.
- 231-737 Michigan - Verizon North Inc. - Mi
- 231-898 Michigan - Carr Tel Co
- 231-326 Michigan - Centurytel Of Michigan, Inc.
- 231-623 Michigan - Lucre, Inc.
- 231-570 Michigan - Dobson Cellular Systems
- 231-578 Michigan - Nextel Communications, Inc.
- 231-440 Michigan - Local Exchange Carriers Of Mic
- 231-308 Michigan - Telnet Worldwide, Inc.
- 231-780 Michigan - Verizon North Inc Mi
- 231-808 Michigan - Local Exchange Carriers Of Mic
- 231-409 Michigan - Dobson Cellular Systems, Inc.
- 231-585 Michigan - Pigeon Tel Co
- 231-903 Michigan - Level 3 Communications
- 231-358 Michigan - Telnet Worldwide, Inc.
- 231-836 Michigan - Local Exchange Carriers Of Mic
- 231-721 Michigan - Local Exchange Carriers Of Mic
- 231-632 Michigan - Dobson Cellular Systems, Inc.
- 231-238 Michigan - Michigan Bell Tel Co Mi
- 231-593 Michigan - Arch Wireless Holdings, Inc.
- 231-315 Michigan - Arch Wireless Holdings, Inc.
- 231-855 Michigan - Dobson Cellular Systems, Inc.
- 231-871 Michigan - Dobson Cellular Systems, Inc.
- 231-822 Michigan - Telnet Worldwide, Inc.
- 231-853 Michigan - Verizon North Inc Mi
- 231-837 Michigan - American Messaging (am), Inc.
- 231-750 Michigan - Alltel Communications, Inc.
- 231-209 Michigan - Telnet Worldwide, Inc.
- 231-306 Michigan - Telnet Worldwide, Inc.
- 231-596 Michigan - Arch Wireless Holdings, Inc.
- 231-344 Michigan - Telnet Worldwide, Inc.
- 231-942 Michigan - Michigan Bell Tel Co Mi
- 231-667 Michigan - Dobson Cellular Systems
- 231-902 Michigan - Telnet Worldwide, Inc.
- 231-420 Michigan - Alltel Communications, Inc.
- 231-620 Michigan - Dobson Cellular Systems, Inc.
- 231-937 Michigan - Acd Telecom
- 231-398 Michigan - Michigan Bell Tel Co Mi
- 231-631 Michigan - Alltel Communications, Inc.
- 231-327 Michigan - Centurytel Wireless, Inc.-mi
- 231-845 Michigan - Verizon North Inc. - Mi
- 231-732 Michigan - Lucre, Inc.
- 231-364 Michigan - Centennial Michiana License Co
- 231-323 Michigan - Lucre, Inc.
- 231-222 Michigan - Level 3 Communications
- 231-662 Michigan - Lucre, Inc.
- 231-232 Michigan - Telnet Worldwide, Inc.
- 231-924 Michigan - Michigan Bell Tel Co - Mi
- 231-797 Michigan - Acd Telecom
- 231-383 Michigan - Alltel Communications
- 231-758 Michigan - Nextel Communications
- 231-332 Michigan - Telnet Worldwide, Inc.
- 231-690 Michigan - Alltel Communications, Inc.
- 231-219 Michigan - Telnet Worldwide, Inc.
- 231-775 Michigan - Michigan Bell Tel Co - Mi
- 231-788 Michigan - Verizon North Inc Mi
- 231-972 Michigan - Centurytel Midwest-michigan, I
- 231-828 Michigan - Charter Fiberlink Michigan
- 231-605 Michigan - Arch Wireless Holdings, Inc.
- 231-534 Michigan - Alltel Communications
- 231-488 Michigan - Local Exchange Carriers Of Mic
- 231-362 Michigan - Kaleva Tel Co
- 231-923 Michigan - Nextel Communications
- 231-947 Michigan - Michigan Bell Tel Co - Mi
- 231-636 Michigan - Local Exchange Carriers Of Mic
- 231-347 Michigan - Michigan Bell Tel Co - Mi
- 231-547 Michigan - Michigan Bell Tel Co - Mi
- 231-389 Michigan - Michigan Bell Tel Co Mi
- 231-946 Michigan - Michigan Bell Tel Co - Mi
- 231-722 Michigan - Verizon North Inc. - Mi
- 231-571 Michigan - Alltel Communications
- 231-214 Michigan - Arch Wireless Holdings, Inc.
- 231-866 Michigan - Dobson Cellular Systems
- 231-679 Michigan - Alltel Communications, Inc.
- 231-243 Michigan - Telnet Worldwide, Inc.
- 231-926 Michigan - Lucre, Inc.
- 231-755 Michigan - Verizon North Inc. - Mi
- 231-549 Michigan - Centurytel Of Michigan, Inc.
- 231-922 Michigan - Michigan Bell Tel Co - Mi
- 231-328 Michigan - Centurytel Of Michigan, Inc.
- 231-829 Michigan - Michigan Bell Tel Co Mi
- 231-368 Michigan - Telnet Worldwide, Inc.
- 231-520 Michigan - Local Exchange Carriers Of Mic
- 231-259 Michigan - Charter Fiberlink Michigan
- 231-928 Michigan - Michigan Bell Tel Co Mi
- 231-714 Michigan - Centurytel Wireless, Inc.-mi
- 231-225 Michigan - Level 3 Communications
- 231-932 Michigan - Michigan Bell Tel Co - Mi
- 231-377 Michigan - Acd Telecom
- 231-728 Michigan - Verizon North Inc. - Mi
- 231-879 Michigan - Michigan Bell Tel Co
- 231-825 Michigan - Michigan Bell Tel Co Mi
- 231-893 Michigan - Verizon North Inc. - Mi
- 231-806 Michigan - Local Exchange Carriers Of Mic
- 231-730 Michigan - Alltel Communications, Inc.
- 231-264 Michigan - Michigan Bell Tel Co Mi
- 231-345 Michigan - Lucre
- 231-274 Michigan - American Messaging (am), Inc.
- 231-388 Michigan - Alltel Communications
- 231-793 Michigan - Lucre
- 231-588 Michigan - Acd Telecom
- 231-276 Michigan - Michigan Bell Tel Co Mi
- 231-592 Michigan - Michigan Bell Tel Co - Mi
- 231-676 Michigan - Dobson Cellular Systems, Inc.
- 231-607 Michigan - Arch Wireless Holdings, Inc.
- 231-568 Michigan - Lucre, Inc.
- 231-878 Michigan - Alltel Communications, Inc.
- 231-435 Michigan - Lucre, Inc.
- 231-739 Michigan - Verizon North Inc. - Mi
- 231-791 Michigan - Long Distance Of Michigan, Inc
- 231-533 Michigan - Acd Telecom
- 231-778 Michigan - Local Exchange Carriers Of Mic
- 231-421 Michigan - Acd Telecom
- 231-813 Michigan - Lucre, Inc.
- 231-233 Michigan - Alltel Communications, Inc.
- 231-509 Michigan - Arch Wireless Holdings, Inc.
- 231-203 Michigan - Dobson Cellular Systems, Inc.
- 231-242 Michigan - Michigan Bell Tel Co Mi
- 231-695 Michigan - Telnet Worldwide, Inc.
- 231-952 Michigan - Arch Wireless Holdings, Inc.
- 231-360 Michigan - Dobson Cellular Systems
- 231-935 Michigan - Michigan Bell Tel Co - Mi
- 231-742 Michigan - Alltel Communications
- 231-218 Michigan - Nextel Communications, Inc.
- 231-844 Michigan - Level 3 Communications
- 231-734 Michigan - Michigan Bell Tel Co Mi
- 231-205 Michigan - Telnet Worldwide, Inc.
- 231-518 Michigan - Level 3 Communications
- 231-220 Michigan - Local Exchange Carriers Of Mic
- 231-546 Michigan - Centurytel Of Michigan, Inc.
- 231-267 Michigan - Acd Telecom
- 231-309 Michigan - Telnet Worldwide, Inc.
- 231-867 Michigan - Centurytel Midwest-michigan, I
- 231-740 Michigan - Cellco Partnership Dba Verizon
- 231-439 Michigan - Michigan Bell Tel Co - Mi
- 231-299 Georgia - Level 3 Communications
- 231-955 Michigan - Dobson Cellular Systems, Inc.
- 231-351 Michigan - Telnet Worldwide, Inc.
- 231-818 Michigan - Dobson Cellular Systems, Inc.
- 231-464 Michigan - Telnet Worldwide
- 231-777 Michigan - Verizon North Inc. - Mi
- 231-767 Michigan - Verizon North Inc Mi
- 231-613 Michigan - Dobson Cellular Systems
- 231-241 Michigan - Daystarr
- 231-516 Michigan - American Messaging (am), Inc.
- 231-584 Michigan - Pigeon Tel Co
- 231-450 Michigan - Dobson Cellular Systems
- 231-704 Michigan - Arch Wireless Holdings, Inc.
- 231-256 Michigan - Michigan Bell Tel Co Mi
- 231-392 Michigan - Michigan Bell Tel Co Mi
- 231-266 Michigan - Michigan Bell Tel Co Mi
- 231-482 Michigan - Lucre, Inc.
- 231-854 Michigan - Verizon North Inc. - Mi
- 231-838 Michigan - Dobson Cellular Systems, Inc.
- 231-290 Michigan - Dobson Cellular Systems, Inc.
- 231-861 Michigan - Verizon North Inc Mi
- 231-335 Michigan - Centennial Michiana License Co
- 231-759 Michigan - Verizon North Inc. - Mi
- 231-827 Michigan - Lucre, Inc.
- 231-423 Michigan - Lucre, Inc.
- 231-357 Michigan - Alltel Communications, Inc.
- 231-727 Michigan - Verizon North Inc. - Mi
- 231-842 Michigan - Local Exchange Carriers Of Mic
- 231-680 Michigan - Level 3 Communications
- 231-437 Michigan - Nextel Communications
- 231-577 Michigan - Talk America Inc Mi
- 231-255 Michigan - Arch Wireless Holdings, Inc.
- 231-330 Michigan - Alltel Communications, Inc.
- 231-373 Michigan - Centurytel Wireless