NumberResearchThousands-blocks in 607-538
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 607-538 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 607 blocks
Most active assignees, all time — NPA 607
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-11-23 | 607-538-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HOBART | NY |
| — | 607-538-1XXX | 1000–1999 | Reserved | VERIZON NEW YORK, INC. | 9104 | HOBART | NY |
| 2004-05-24 | 607-538-2XXX | 2000–2999 | Assigned | TC SYSTEMS, INC. - NY | 7140 | HOBART | NY |
| 2007-04-03 | 607-538-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HOBART | NY |
| — | 607-538-4XXX | 4000–4999 | Available | HOBART | NY | ||
| 2012-01-10 | 607-538-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | HOBART | NY |
| 2013-04-01 | 607-538-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | HOBART | NY |
| 2013-04-01 | 607-538-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | HOBART | NY |
| 2014-10-17 | 607-538-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | HOBART | NY |
| — | 607-538-9XXX | 9000–9999 | Reserved | VERIZON NEW YORK, INC. | 9104 | HOBART | NY |
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.