NumberResearchThousands-blocks in 562-551
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 562-551 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 562 blocks
Most active assignees, all time — NPA 562
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-09-12 | 562-551-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PICORIVERA | CA |
| 2018-03-02 | 562-551-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PICORIVERA | CA |
| 2018-03-02 | 562-551-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PICORIVERA | CA |
| — | 562-551-3XXX | 3000–3999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | PICORIVERA | CA |
| 2018-10-11 | 562-551-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PICORIVERA | CA |
| 2013-05-08 | 562-551-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | PICORIVERA | CA |
| 2013-03-04 | 562-551-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | PICORIVERA | CA |
| 2013-01-30 | 562-551-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PICORIVERA | CA |
| 2008-10-22 | 562-551-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PICORIVERA | CA |
| 2019-01-25 | 562-551-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PICORIVERA | CA |
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.