NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
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 |
|---|---|---|---|---|---|
| 310-945 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CULVERCITY | CA | |
| 310-953 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | TORRANCE | CA | |
| 310-954 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | W ANGELES | CA | |
| 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 | |
| 312-205 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-252 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-256 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-260 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-276 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-277 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-327 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-377 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-416 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-453 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-470 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-577 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-601 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-604 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-628 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 312-780 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-803 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-821 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-873 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICGOZN01 | IL | |
| 312-894 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL | |
| 313-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN6 | MI | |
| 313-230 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI | |
| 313-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI | |
| 313-286 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN5 | MI | |
| 313-347 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-416 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN4 | MI | |
| 313-422 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI | |
| 313-449 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-450 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN5 | MI | |
| 313-457 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN6 | MI | |
| 313-557 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI | |
| 313-651 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN4 | MI | |
| 313-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI | |
| 313-732 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-733 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.