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 |
|---|---|---|---|---|---|
| 2012-04-24 | 516-743 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN05 | NY |
| 2012-03-30 | 585-441 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2011-12-23 | 929-221 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2011-06-14 | 516-493 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN05 | NY |
| 2011-06-08 | 914-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | YORKTN HTS | NY |
| 2011-06-01 | 585-358 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | HENRIETTA | NY |
| 2011-02-22 | 631-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | RIVERHEAD | NY |
| 2011-01-26 | 516-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN03 | NY |
| 2010-01-27 | 631-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | AMAGANSETT | NY |
| 2009-10-16 | 585-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | FAIRPORT | NY |
| 2009-10-16 | 716-529 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WILLIAMSVL | NY |
| 2009-09-30 | 585-456 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2009-09-30 | 716-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BUFFALO | NY |
| 2009-09-25 | 585-625 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2009-02-09 | 631-533 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CENTRAISLP | NY |
| 2008-11-06 | 845-442 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | DOVER PL | NY |
| 2008-08-12 | 518-649 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ALBANY | NY |
| 2008-08-12 | 607-873 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ELMIRA | NY |
| 2008-07-24 | 845-481 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | KINGSTON | NY |
| 2007-12-21 | 845-580 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | PIERMONT | NY |
| 2007-08-29 | 845-584 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CONGERS | NY |
| 2007-05-11 | 646-454 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN01 | NY |
| 2007-04-19 | 347-648 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN08 | NY |
| 2007-04-18 | 516-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN09 | NY |
| 2006-11-21 | 845-205 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NORTHSALEM | NY |
| 2006-08-23 | 631-403 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | PTJEFFERSN | NY |
| 2006-08-22 | 845-523 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CONGERS | NY |
| 2006-08-22 | 914-810 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CRTNONHDSN | NY |
| 2006-02-03 | 631-602 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SHELTER IS | NY |
| 2006-02-02 | 914-292 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BEDFORDVLG | NY |
| 2006-01-13 | 631-596 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | QUOGUE | NY |
| 2006-01-13 | 631-616 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | PECONIC | NY |
| 2006-01-13 | 914-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | KATONAH | NY |
| 2005-05-02 | 347-750 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2004-08-19 | 607-207 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | ELMIRA | NY |
| 2004-08-19 | 845-674 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | NEWBURGH | NY |
| 2004-05-07 | 845-589 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | CONGERS | NY |
| 2003-12-08 | 631-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BAYPORT | NY |
| 2003-11-07 | 518-788 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | ALBANY | NY |
| 2003-09-05 | 315-552 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SYRACUSE | NY |
| 2001-05-03 | 631-418 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | HUNTINGTON | NY |
| 2001-04-03 | 914-579 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | PLEASANTVL | NY |
| 2001-03-22 | 914-586 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | WSCHSTZN07 | NY |
| 2001-03-19 | 914-487 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | OSSINING | NY |
| 2001-03-19 | 914-752 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | MOUNTKISCO | NY |
| 2001-01-10 | 914-432 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | OSSINING | NY |
| 2001-01-10 | 914-530 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | MT VERNON | NY |
| 2001-01-10 | 914-623 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN01 | NY |
| 2001-01-10 | 914-733 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | MOUNTKISCO | NY |
| 2001-01-10 | 914-819 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN03 | NY |
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.