NumberResearchThousands-blocks in 508-242
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 508-242 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, last 30 days — NPA 508
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 508-242-0XXX | 0000–0999 | Reserved | VERIZON NEW ENGLAND INC. | 9102 | MEDFIELD | MA |
| 2019-04-11 | 508-242-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MA | 892D | MEDFIELD | MA |
| 2015-09-22 | 508-242-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MEDFIELD | MA |
| 2004-08-09 | 508-242-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | MEDFIELD | MA |
| 2026-08-26 | 508-242-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | MEDFIELD | MA |
| 2004-12-06 | 508-242-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MEDFIELD | MA |
| 2005-07-12 | 508-242-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | MEDFIELD | MA |
| 2007-02-07 | 508-242-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | MEDFIELD | MA |
| — | 508-242-8XXX | 8000–8999 | Reserved | VERIZON NEW ENGLAND INC. | 9102 | MEDFIELD | MA |
| — | 508-242-9XXX | 9000–9999 | Reserved | VERIZON NEW ENGLAND INC. | 9102 | MEDFIELD | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.