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 |
|---|---|---|---|---|---|
| 310-955 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL SEGUNDO | CA | |
| 310-956 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HAWTHORNE | CA | |
| 310-957 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | INGLEWOOD | CA | |
| 310-971 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SAN PEDRO | CA | |
| 310-974 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | TORRANCE | CA | |
| 310-975 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA | |
| 323-336 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 09 | CA | |
| 408-215 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SUNNYVALE | CA | |
| 408-273 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA | |
| 408-424 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA | |
| 408-490 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA | |
| 408-856 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA | |
| 408-990 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SUNNYVALE | CA | |
| 415-963 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA | |
| 510-214 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD ALMD | CA | |
| 510-269 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD FRTVL | CA | |
| 510-285 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD MN-PD | CA | |
| 510-404 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK GRNLF | CA | |
| 510-572 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK OLIVR | CA | |
| 510-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HAYWARD | CA | |
| 510-771 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK OLIVR | CA | |
| 510-789 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK MAIN | CA | |
| 510-877 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD TRNID | CA | |
| 510-982 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD BKLY | CA | |
| 562-340 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ALAMITOS | CA | |
| 562-343 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ALAMITOS | CA | |
| 562-382 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DOWNEY | CA | |
| 562-383 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA HABRA | CA | |
| 562-384 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAKEWOOD | CA | |
| 562-506 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LONG BEACH | CA | |
| 562-528 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LONG BEACH | CA | |
| 562-565 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NORWALK | CA | |
| 562-566 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PICORIVERA | CA | |
| 562-567 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WHITTIER | CA | |
| 562-582 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CMTN CMTN | CA | |
| 562-791 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CMTN CMTN | CA | |
| 619-210 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CHULAVISTA | CA | |
| 619-212 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL CAJON | CA | |
| 619-213 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CHULAVISTA | CA | |
| 619-215 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONADO | CA | |
| 619-243 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA | |
| 619-402 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL CAJON | CA | |
| 619-403 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA MESA | CA | |
| 619-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA MESA | CA | |
| 619-415 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA MESA | CA | |
| 619-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA | |
| 619-512 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA | |
| 619-599 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL CAJON | CA | |
| 619-610 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA | |
| 619-757 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
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.