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.
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 773-787 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN10 | IL | |
| 773-799 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN04 | IL | |
| 773-830 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN05 | IL | |
| 773-887 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN05 | IL | |
| 773-893 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN06 | IL | |
| 773-896 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN07 | IL | |
| 773-917 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN11 | IL | |
| 773-948 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN08 | IL | |
| 773-967 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN09 | IL | |
| 773-981 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN10 | IL | |
| 773-985 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN11 | IL | |
| 775-332 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 7376 | RENO | NV | |
| 775-335 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 7376 | RENO | NV | |
| 775-834 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 7376 | RENO | NV | |
| 775-954 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 7376 | RENO | NV | |
| 781-203 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BURLINGTON | MA | |
| 781-217 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KINGSTON | MA | |
| 781-219 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MEDFORD | MA | |
| 781-232 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CANTON | MA | |
| 781-240 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | MA | |
| 781-241 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REVERE | MA | |
| 781-257 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LINCOLN | MA | |
| 781-268 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LYNN | MA | |
| 781-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MALDEN | MA | |
| 781-295 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAKEFIELD | MA | |
| 781-301 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | MA | |
| 781-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRAINTREE | MA | |
| 781-304 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WELLESLEY | MA | |
| 781-305 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WOBURN | MA | |
| 781-307 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAUGUS | MA | |
| 781-309 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LYNN | MA | |
| 781-313 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BURLINGTON | MA | |
| 781-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STOUGHTON | MA | |
| 781-347 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROCKLAND | MA | |
| 781-357 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | MA | |
| 781-358 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINCHESTER | MA | |
| 781-371 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WELLESLEY | MA | |
| 781-394 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRAINTREE | MA | |
| 781-410 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DEDHAM | MA | |
| 781-412 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCITUATE | MA | |
| 781-457 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | MA | |
| 781-459 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DEDHAM | MA | |
| 781-478 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALTHAM | MA | |
| 781-480 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MALDEN | MA | |
| 781-494 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BURLINGTON | MA | |
| 781-496 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WOBURN | MA | |
| 781-498 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MEDFORD | MA | |
| 781-501 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NORWOOD | MA | |
| 781-502 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MALDEN | MA | |
| 781-503 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WOBURN | MA |
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.