NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, all time
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Sep 2026
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2013-03-15 | 929-227 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN03 | NY |
| 2013-03-04 | 210-801 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2013-03-04 | 832-787 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2013-03-04 | 916-246 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA |
| 2013-03-01 | 720-613 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUDSON | CO |
| 2013-02-28 | 208-497 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | IDAHOFALLS | ID |
| 2013-02-18 | 917-966 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2013-02-12 | 440-910 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
| 2013-02-11 | 440-620 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
| 2013-02-11 | 903-417 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEW BOSTON | TX |
| 2013-02-08 | 207-360 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ME | 7777 | WELLS | ME |
| 2013-02-08 | 575-468 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | PORTALES | NM |
| 2013-02-05 | 785-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | ROSSVILLE | KS |
| 2013-01-30 | 862-404 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHIPPANY | NJ |
| 2013-01-29 | 385-722 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SALT LAKE | UT |
| 2013-01-21 | 443-836 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BALTIMORE | MD |
| 2013-01-21 | 571-326 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2013-01-10 | 651-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | NORTH BRCH | MN |
| 2012-12-31 | 312-702 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2012-12-19 | 732-243 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | METUCHEN | NJ |
| 2012-11-27 | 443-720 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ABERDEEN | MD |
| 2012-11-27 | 484-403 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | BETHLEHEM | PA |
| 2012-11-21 | 202-818 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2012-11-20 | 571-386 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN19 | VA |
| 2012-11-19 | 614-904 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | GAHANNA | OH |
| 2012-11-16 | 234-231 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | AKRON | OH |
| 2012-11-16 | 512-952 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2012-11-16 | 720-634 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2012-11-15 | 208-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BAYVIEW | ID |
| 2012-11-13 | 814-892 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | SOUTH FORK | PA |
| 2012-11-09 | 434-602 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | JARRATT | VA |
| 2012-11-09 | 757-785 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | NRFOLKZON2 | VA |
| 2012-11-06 | 681-255 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BLUEFIELD | WV |
| 2012-11-02 | 669-223 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2012-10-11 | 562-473 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LONG BEACH | CA |
| 2012-10-11 | 917-634 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN04 | NY |
| 2012-10-09 | 480-448 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2012-10-08 | 646-650 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2012-10-05 | 210-610 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2012-09-11 | 201-713 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | UNION CITY | NJ |
| 2012-08-30 | 561-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | BOCA RATON | FL |
| 2012-08-29 | 571-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN08 | VA |
| 2012-08-28 | 760-493 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VICTORVL | CA |
| 2012-08-13 | 774-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| 2012-06-14 | 512-813 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2012-06-13 | 571-375 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2012-06-11 | 585-397 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2012-06-05 | 717-547 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | HARISBGZN1 | PA |
| 2012-05-17 | 408-614 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMPBELL | CA |
| 2012-05-14 | 518-417 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ALBANY | NY |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.