NumberResearchThousands-blocks in 570-225
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 570-225 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 570 blocks
Most active assignees, all time — NPA 570
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-11-17 | 570-225-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | TAMAQUA | PA |
| 2006-11-17 | 570-225-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TAMAQUA | PA |
| — | 570-225-2XXX | 2000–2999 | Available | TAMAQUA | PA | ||
| 2006-10-04 | 570-225-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | TAMAQUA | PA |
| 2011-02-11 | 570-225-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | TAMAQUA | PA |
| 2007-02-21 | 570-225-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TAMAQUA | PA |
| 2005-10-28 | 570-225-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TAMAQUA | PA |
| 2005-05-30 | 570-225-7XXX | 7000–7999 | Assigned | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | TAMAQUA | PA |
| 2008-03-07 | 570-225-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TAMAQUA | PA |
| 2012-06-08 | 570-225-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | TAMAQUA | 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.