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 |
|---|---|---|---|---|---|
| 860-322 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DEEP RIVER | CT | |
| 860-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIMSBURY | CT | |
| 860-325 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIMSBURY | CT | |
| 860-327 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MANCHESTER | CT | |
| 860-329 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SOUTHINGTN | CT | |
| 860-331 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-337 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLUMBIA | CT | |
| 860-339 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OLD SAYBRK | CT | |
| 860-341 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STORRS | CT | |
| 860-351 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLAINVILLE | CT | |
| 860-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CANTON | CT | |
| 860-356 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWBRITAIN | CT | |
| 860-357 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWBRITAIN | CT | |
| 860-359 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLUMBIA | CT | |
| 860-374 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DEEP RIVER | CT | |
| 860-375 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROCKVILLE | CT | |
| 860-397 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SHARON | CT | |
| 860-406 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SOUTHINGTN | CT | |
| 860-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SOUTHINGTN | CT | |
| 860-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COVENTRY | CT | |
| 860-554 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HADDAM | CT | |
| 860-616 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-618 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TORRINGTON | CT | |
| 860-706 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-707 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-713 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-754 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETOWN | CT | |
| 860-808 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-813 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | E HAMPTON | CT | |
| 860-814 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ENFIELD | CT | |
| 860-815 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GLASTONBY | CT | |
| 860-816 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-817 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-818 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-819 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-901 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSORLKS | CT | |
| 860-902 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSOR | CT | |
| 860-903 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSORLKS | CT | |
| 860-904 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-906 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-907 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSOR | CT | |
| 860-920 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-973 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRISTOL | CT | |
| 860-975 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETOWN | CT | |
| 862-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRANCHVL | NJ | |
| 865-291 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KNOXVILLE | TN | |
| 865-292 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KNOXVILLE | TN | |
| 865-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KNOXVILLE | TN | |
| 865-294 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN | |
| 901-202 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MEMPHIS | TN |
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.