NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 650
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-12-19 | 650-682-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2017-12-19 | 650-682-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2017-12-11 | 650-682-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2017-11-29 | 650-202-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-202-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2017-11-29 | 650-682-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2017-11-29 | 650-682-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2017-11-29 | 650-682-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2016-03-07 | 650-832-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCRL-BLMT | CA |
| 2010-03-26 | 650-627-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2009-02-13 | 650-336-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MT VIEW | CA |
| 2009-02-13 | 650-485-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2009-02-13 | 650-552-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MILLBRAE | CA |
| 2009-02-13 | 650-758-9XXX | 9000–9999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNFC JUNPR | CA |
| 2008-10-20 | 650-362-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDWOOD CY | CA |
| 2008-10-20 | 650-577-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2008-10-20 | 650-870-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SSNFRNCSCO | CA |
| 2008-10-20 | 650-879-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PESCADERO | CA |
| 2008-10-06 | 650-597-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCRL-BLMT | CA |
| 2006-06-02 | 650-294-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MATEO | CA |
| 2006-06-02 | 650-388-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PALO ALTO | CA |
| 2006-06-02 | 650-542-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDWOOD CY | CA |
| 2006-06-02 | 650-550-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNFC JUNPR | CA |
| 2006-06-02 | 650-557-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PACIFICA | CA |
| 2006-06-02 | 650-632-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCRL-BLMT | CA |
| 2006-06-02 | 650-718-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOSS BEACH | CA |
| 2006-06-02 | 650-729-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | HALFMOONBY | CA |
| 2006-06-02 | 650-747-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LA HONDA | CA |
| 2006-06-02 | 650-777-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MILLBRAE | CA |
| 2006-06-02 | 650-850-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WOODSIDE | CA |
| 2006-04-03 | 650-879-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PESCADERO | CA |
| 2005-10-20 | 650-940-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MT VIEW | CA |
| 2005-10-14 | 650-492-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LOS ALTOS | CA |
| 2005-03-07 | 650-676-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SSNFRNCSCO | 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.