NumberResearchThousands-blocks in 508-440
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 508-440 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 508 blocks
Most active assignees, all time — NPA 508
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-03-27 | 508-440-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | FRANKLIN | MA |
| 2016-09-23 | 508-440-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FRANKLIN | MA |
| 2006-06-12 | 508-440-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | FRANKLIN | MA |
| 2015-12-03 | 508-440-3XXX | 3000–3999 | Assigned | BARR TELL USA, INC. - MA | 732H | FRANKLIN | MA |
| 2024-01-31 | 508-440-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | FRANKLIN | MA |
| 2005-03-15 | 508-440-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | FRANKLIN | MA |
| 2015-05-07 | 508-440-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FRANKLIN | MA |
| 2016-06-20 | 508-440-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FRANKLIN | MA |
| — | 508-440-8XXX | 8000–8999 | Reserved | RCN TELECOM SERVICES, INC. - MA | 7619 | FRANKLIN | MA |
| 2008-06-11 | 508-440-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FRANKLIN | 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.