NumberResearchThousands-blocks in 661-449
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 661-449 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 661 blocks
Most active assignees, all time — NPA 661
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 661-449-0XXX | 0000–0999 | Reserved | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| — | 661-449-1XXX | 1000–1999 | Reserved | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| — | 661-449-2XXX | 2000–2999 | Reserved | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| — | 661-449-3XXX | 3000–3999 | Reserved | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2005-05-20 | 661-449-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-05-20 | 661-449-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-05-20 | 661-449-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-07-19 | 661-449-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2005-08-18 | 661-449-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLDL PLDL | CA |
| 2005-05-27 | 661-449-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | 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.