NumberResearchThousands-blocks in 561-908
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 561-908 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 561 blocks
Most active assignees, all time — NPA 561
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 561-908-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | DELRAY BCH | FL |
| 2008-11-07 | 561-908-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | DELRAY BCH | FL |
| 2008-10-13 | 561-908-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DELRAY BCH | FL |
| 2009-08-28 | 561-908-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | DELRAY BCH | FL |
| 2009-11-17 | 561-908-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | DELRAY BCH | FL |
| 2005-06-27 | 561-908-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | DELRAY BCH | FL |
| 2005-06-27 | 561-908-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | DELRAY BCH | FL |
| — | 561-908-7XXX | 7000–7999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | DELRAY BCH | FL |
| 2021-04-16 | 561-908-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM, INC. - FL | 382G | DELRAY BCH | FL |
| 2022-02-18 | 561-908-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DELRAY BCH | FL |
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.