NumberResearchThousands-blocks in 661-768
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 661-768 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
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-09-05 | 661-768-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | TAFT | CA |
| 2019-01-25 | 661-768-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | TAFT | CA |
| 2019-01-25 | 661-768-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | TAFT | CA |
| — | 661-768-3XXX | 3000–3999 | Reserved | FRONTIER CALIFORNIA INC. | 4420 | TAFT | CA |
| — | 661-768-4XXX | 4000–4999 | Reserved | FRONTIER CALIFORNIA INC. | 4420 | TAFT | CA |
| — | 661-768-5XXX | 5000–5999 | Reserved | FRONTIER CALIFORNIA INC. | 4420 | TAFT | CA |
| 2012-10-16 | 661-768-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | TAFT | CA |
| 2014-07-14 | 661-768-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TAFT | CA |
| 2013-04-01 | 661-768-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TAFT | CA |
| 2018-06-26 | 661-768-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | TAFT | 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.