NumberResearchRecent thousands-block assignments
7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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, last 30 days — NPA 508
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-03-08 | 508-909-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | SOUTHBDG | MA |
| 2002-03-08 | 508-924-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | EBRIDGEWTR | MA |
| 2002-03-08 | 508-964-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | MANSFIELD | MA |
| 2002-03-08 | 508-966-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BELLINGHAM | MA |
| 2002-03-08 | 508-987-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | OXFORD | MA |
| — | 508-313-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROCKTON | MA |
| — | 508-313-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROCKTON | MA |
| — | 508-313-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROCKTON | MA |
| — | 508-530-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRANKLIN | MA |
| — | 508-530-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRANKLIN | MA |
| — | 508-573-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| — | 508-573-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| — | 508-573-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| — | 508-573-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| — | 508-573-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| — | 508-595-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WORCESTER | MA |
| — | 508-598-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRAMINGHAM | MA |
| — | 508-861-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRAMINGHAM | MA |
| — | 508-906-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MEDFIELD | MA |
| — | 508-906-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MEDFIELD | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.