NumberResearchThousands-blocks in 508-217
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 508-217 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 508-217-0XXX | 0000–0999 | Reserved | TC SYSTEMS, INC. | 7135 | BRIDGEWTR | MA |
| 2008-02-07 | 508-217-1XXX | 1000–1999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BRIDGEWTR | MA |
| 2018-11-09 | 508-217-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BRIDGEWTR | MA |
| 2006-01-17 | 508-217-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIDGEWTR | MA |
| 2007-07-20 | 508-217-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIDGEWTR | MA |
| — | 508-217-5XXX | 5000–5999 | Available | BRIDGEWTR | MA | ||
| 2015-04-27 | 508-217-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BRIDGEWTR | MA |
| 2011-05-31 | 508-217-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BRIDGEWTR | MA |
| 2008-08-29 | 508-217-8XXX | 8000–8999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BRIDGEWTR | MA |
| 2017-04-18 | 508-217-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | BRIDGEWTR | 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.