NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 916
T-MOBILE USA, INC. 446
ONVOY, LLC - CA 397
NEW CINGULAR WIRELESS PCS, LLC 374
METROPCS, INC. 362
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 331
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
2017-08-09 916-619-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-09 916-619-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-08 916-301-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2017-08-08 916-301-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2017-08-03 916-306-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D SCRM MAIN CA
2017-08-03 916-306-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D SCRM MAIN CA
2017-08-02 916-926-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2017-07-31 916-301-0XXX 0000–0999Assigned ASTOUND BROADBAND, LLC - CA 485E RSVL CTHT CA
2017-07-20 916-886-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2017-07-20 916-886-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2017-07-17 916-314-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2017-07-17 916-975-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2017-06-27 916-305-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2017-06-27 916-305-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2017-06-27 916-744-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COURTLAND CA
2017-06-23 916-926-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2017-06-23 916-926-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2017-06-22 916-926-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2017-06-15 916-465-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-06-13 916-926-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2017-05-24 916-755-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2017-05-16 916-461-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2017-05-16 916-526-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2017-05-16 916-713-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2017-05-09 916-260-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FOLSOM CA
2017-04-28 916-545-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2017-04-28 916-963-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2017-04-26 916-250-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SO PLACER CA
2017-04-26 916-305-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2017-04-21 916-713-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
2017-04-21 916-758-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2017-04-19 916-633-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2017-04-19 916-633-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2017-04-10 916-260-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2017-04-03 916-754-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-04-03 916-754-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-04-03 916-754-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-04-03 916-754-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-04-03 916-754-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2017-03-30 916-831-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-30 916-831-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-30 916-831-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-30 916-831-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-30 916-831-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-30 916-926-6XXX 6000–6999Assigned COMMIO, LLC 939H SCRM MAIN 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.