NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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, last 30 days — NPA 650
ONVOY, LLC - CA 11
T-MOBILE USA, INC. 4
BANDWIDTH.COM CLEC, LLC - CA 2
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-02-13 650-536-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC JUNPR CA
2018-02-06 650-505-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2018-01-23 650-830-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCRL-BLMT CA
2018-01-18 650-402-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2018-01-11 650-849-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2018-01-10 650-680-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOS ALTOS CA
2018-01-04 650-390-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2017-12-21 650-313-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-12-21 650-313-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-12-21 650-313-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-12-21 650-812-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-12-21 650-845-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-12-19 650-682-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-12-19 650-682-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-12-13 650-379-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SSNFRNCSCO CA
2017-12-11 650-682-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-12-08 650-314-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2017-12-07 650-484-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2017-12-07 650-525-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2017-12-06 650-313-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2017-11-29 650-202-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-202-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAN MATEO CA
2017-11-29 650-682-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-11-29 650-682-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-11-29 650-682-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2017-11-21 650-313-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2017-11-21 650-313-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2017-11-08 650-447-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2017-11-08 650-448-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2017-10-30 650-379-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2017-10-06 650-865-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2017-10-06 650-865-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2017-09-29 650-313-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-09-29 650-313-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-09-29 650-313-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2017-09-15 650-309-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-09-15 650-309-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-09-15 650-309-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-09-12 650-379-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SSNFRNCSCO CA
2017-09-12 650-447-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2017-09-12 650-865-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN MATEO CA
2017-09-08 650-516-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PACIFICA CA
2017-09-08 650-832-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCRL-BLMT CA
2017-08-31 650-865-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SAN MATEO CA
2017-08-28 650-313-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO 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.