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 |
|---|---|---|---|---|---|
| 2001-03-14 | 443-334 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PIKESVILLE | MD |
| 2001-03-12 | 602-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2001-03-08 | 617-952 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHARLESTN | MA |
| 2001-03-06 | 484-805 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN30 | PA |
| 2001-03-06 | 914-485 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NORTHSALEM | NY |
| 2001-03-05 | 484-536 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EASTON | PA |
| 2001-03-01 | 805-433 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIMIVALLEY | CA |
| 2001-02-27 | 678-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA NW | GA |
| 2001-02-26 | 954-653 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | FTLAUDERDL | FL |
| 2001-02-23 | 781-300 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RANDOLPH | MA |
| 2001-02-23 | 781-413 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WEYMOUTH | MA |
| 2001-02-23 | 781-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAKEFIELD | MA |
| 2001-02-23 | 781-909 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | READING | MA |
| 2001-02-23 | 781-973 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LYNNFIELD | MA |
| 2001-02-22 | 323-389 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LSAN DA 12 | CA |
| 2001-02-22 | 763-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2001-02-21 | 443-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WOODLAWN | MD |
| 2001-02-21 | 443-433 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANNAPOLIS | MD |
| 2001-02-21 | 443-576 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RANDALLSTN | MD |
| 2001-02-21 | 443-637 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ARGRGBSNIS | MD |
| 2001-02-20 | 443-650 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REISTERSTN | MD |
| 2001-02-13 | 240-404 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2001-02-13 | 240-489 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | POOLESVL | MD |
| 2001-02-13 | 240-523 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LA PLATA | MD |
| 2001-02-13 | 240-538 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEONARDTN | MD |
| 2001-02-13 | 240-652 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MECHANCSVL | MD |
| 2001-02-13 | 240-718 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LXTNPKGRML | MD |
| 2001-02-13 | 240-823 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRANDYWINE | MD |
| 2001-02-13 | 240-837 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUGHESVL | MD |
| 2001-02-13 | 240-993 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | INDIANHEAD | MD |
| 2001-02-09 | 201-473 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HASBROKHTS | NJ |
| 2001-02-09 | 484-636 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN30 | PA |
| 2001-02-09 | 724-234 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BUTLER | PA |
| 2001-02-08 | 412-548 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN17 | PA |
| 2001-02-06 | 763-210 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2001-02-02 | 973-965 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ORANGE | NJ |
| 2001-01-29 | 609-228 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | PRINCETON | NJ |
| 2001-01-29 | 732-533 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETOWN | NJ |
| 2001-01-29 | 732-953 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CARTERET | NJ |
| 2001-01-29 | 734-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROCKWOOD | MI |
| 2001-01-26 | 612-435 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2001-01-26 | 954-919 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | HOLLYWOOD | FL |
| 2001-01-25 | 619-649 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA |
| 2001-01-25 | 818-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | CA |
| 2001-01-24 | 815-880 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | WOODSTOCK | IL |
| 2001-01-22 | 412-535 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2001-01-18 | 973-996 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SO ORANGE | NJ |
| 2001-01-15 | 443-558 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ABERDEEN | MD |
| 2001-01-12 | 781-919 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HINGHAM | MA |
| 2001-01-12 | 781-984 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STONEHAM | MA |
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.