NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 610
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
May 2026
Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-05-21 | 610-727-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN28 | PA |
| 2019-05-22 | 610-484-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2017-12-05 | 610-226-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | COLLEGEVL | PA |
| 2017-02-07 | 610-808-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN10 | PA |
| 2015-07-16 | 610-214-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | COOPERSBG | PA |
| 2015-07-16 | 610-426-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | KUTZTOWN | PA |
| 2015-07-16 | 610-881-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PEN ARGYL | PA |
| 2013-08-14 | 610-848-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2013-08-14 | 610-848-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2013-08-14 | 610-848-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2013-08-14 | 610-848-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2013-02-19 | 610-714-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | LEHIGHTON | PA |
| 2010-04-20 | 610-756-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | KEMPTON | PA |
| 2010-02-17 | 610-814-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | BETHLEHEM | PA |
| 2009-04-22 | 610-273-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | HONEYBROOK | PA |
| 2009-04-22 | 610-321-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | EAGLE | PA |
| 2009-04-22 | 610-563-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | AVONDALE | PA |
| 2009-03-02 | 610-973-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | ALLENTOWN | PA |
| 2009-02-06 | 610-732-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | W CHESTER | PA |
| 2008-08-07 | 610-550-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2008-06-05 | 610-355-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2008-06-05 | 610-387-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN10 | PA |
| 2008-06-05 | 610-455-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | WESTTOWN | PA |
| 2008-06-05 | 610-536-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN21 | PA |
| 2008-06-05 | 610-548-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN12 | PA |
| 2008-06-05 | 610-553-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN17 | PA |
| 2008-06-05 | 610-605-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN13 | PA |
| 2008-06-05 | 610-619-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN11 | PA |
| 2008-06-05 | 610-708-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | MENDENHALL | PA |
| 2008-06-05 | 610-765-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | KENNETT SQ | PA |
| 2008-06-05 | 610-783-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| 2008-05-27 | 610-222-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | CENTER PT | PA |
| 2008-05-27 | 610-590-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | CHESTERSPG | PA |
| 2008-04-15 | 610-596-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | CATASAUQUA | PA |
| 2008-04-09 | 610-502-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | NORTHAMPTN | PA |
| 2008-04-08 | 610-271-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| 2008-04-08 | 610-271-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| 2008-04-08 | 610-271-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| 2008-04-08 | 610-271-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| 2008-04-03 | 610-365-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | NAZARETH | PA |
| 2008-03-17 | 610-235-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | W CHESTER | PA |
| 2007-01-23 | 610-741-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2007-01-17 | 610-750-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2006-04-12 | 610-255-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | KEMBLESVL | PA |
| 2006-04-12 | 610-806-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | WEST GROVE | PA |
| 2004-09-02 | 610-743-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2004-07-06 | 610-492-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| 2002-03-07 | 610-568-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.