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 |
|---|---|---|---|---|---|
| 858-408 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-410 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-430 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-434 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-609 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-703 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-704 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-712 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-716 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-724 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-726 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA | |
| 858-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-737 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-753 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-761 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNDG MRMS | CA | |
| 858-799 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-836 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-859 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA | |
| 858-877 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-879 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-880 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-901 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-905 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-935 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-946 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 859-394 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | COVINGTON | KY | |
| 859-429 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | INDEPNDNCE | KY | |
| 859-568 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | BOONE | KY | |
| 859-592 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | ALEXANDRIA | KY | |
| 859-692 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | BOONE | KY | |
| 859-814 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KY | 6161 | COVINGTON | KY | |
| 860-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSORLKS | CT | |
| 860-255 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FARMINGTON | CT | |
| 860-256 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-259 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWBRITAIN | CT | |
| 860-261 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRISTOL | CT | |
| 860-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETOWN | CT | |
| 860-263 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARTFORD | CT | |
| 860-264 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIMSBURY | CT | |
| 860-265 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ENFIELD | CT | |
| 860-266 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GLASTONBY | CT | |
| 860-269 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FARMINGTON | CT | |
| 860-294 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TORRINGTON | CT | |
| 860-315 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PUTNAM | CT | |
| 860-316 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETOWN | CT | |
| 860-317 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLAINFIELD | CT | |
| 860-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CORNWALL | CT | |
| 860-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NORWICH | CT | |
| 860-321 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FARMINGTON | CT |
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.