NumberResearchThousands-blocks in 661-773
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 661-773 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 661-773-0XXX | 0000–0999 | Available | WALKERBSIN | CA | ||
| — | 661-773-1XXX | 1000–1999 | Available | WALKERBSIN | CA | ||
| 2021-10-20 | 661-773-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | WALKERBSIN | CA |
| 2018-06-27 | 661-773-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | WALKERBSIN | CA |
| — | 661-773-4XXX | 4000–4999 | Available | WALKERBSIN | CA | ||
| 2021-10-20 | 661-773-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | WALKERBSIN | CA |
| — | 661-773-6XXX | 6000–6999 | Available | WALKERBSIN | CA | ||
| 2011-03-09 | 661-773-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WALKERBSIN | CA |
| 2023-12-06 | 661-773-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WALKERBSIN | CA |
| 2018-09-25 | 661-773-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | WALKERBSIN | 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.