NumberResearchThousands-blocks in 610-455
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 610-455 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 610 blocks
Most active assignees, all time — NPA 610
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 610-455-0XXX | 0000–0999 | Reserved | VERIZON PENNSYLVANIA, INC. | 9208 | WESTTOWN | PA |
| — | 610-455-1XXX | 1000–1999 | Reserved | VERIZON PENNSYLVANIA, INC. | 9208 | WESTTOWN | PA |
| 2004-09-10 | 610-455-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | WESTTOWN | PA |
| — | 610-455-3XXX | 3000–3999 | Reserved | VERIZON PENNSYLVANIA, INC. | 9208 | WESTTOWN | PA |
| 2008-06-05 | 610-455-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | WESTTOWN | PA |
| 2009-06-15 | 610-455-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | WESTTOWN | PA |
| 2003-04-17 | 610-455-6XXX | 6000–6999 | Assigned | NETCARRIER TELECOM, INC. - PA | 5494 | WESTTOWN | PA |
| 2021-11-20 | 610-455-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTTOWN | PA |
| 2021-11-20 | 610-455-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTTOWN | PA |
| 2021-11-20 | 610-455-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTTOWN | PA |
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.