NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

24 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 530
ONVOY, LLC - CA 9
BANDWIDTH.COM CLEC, LLC - CA 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 4
OPENTACT INC. 3
T-MOBILE USA, INC. 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
2011-05-25 530-710-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2011-05-20 530-948-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MERIDIAN CA
2011-05-17 530-212-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WINTERS CA
2011-05-17 530-213-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C NTAH BCWY CA
2011-05-17 530-427-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SODA SPG CA
2011-05-17 530-470-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C NEVADACITY CA
2011-05-17 530-507-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ESPARTO CA
2011-05-17 530-563-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TRUCKEE CA
2011-05-17 530-580-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NTAH THCY CA
2011-05-17 530-617-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LIVE OAK CA
2011-05-17 530-652-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRVY SOUTH CA
2011-05-17 530-686-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C HOMEWOOD CA
2011-05-17 530-719-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PLVL SOUTH CA
2011-05-17 530-724-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DUNNIGAN CA
2011-05-17 530-802-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRVY MAIN CA
2011-05-17 530-830-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C AUBN NORTH CA
2011-05-17 530-903-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C PLVL WEST CA
2011-05-09 530-881-1XXX 1000–1999Assigned WIDE VOICE, LLC - CA 252F VERDI CA
2011-05-06 530-229-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2011-05-06 530-297-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS CA
2011-05-06 530-523-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HOMEWOOD CA
2011-05-06 530-727-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RED BLUFF CA
2011-05-05 530-329-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2011-05-05 530-412-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 NTAH THCY CA
2011-04-28 530-500-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C DUNSMUIR CA
2011-04-26 530-302-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS CA
2011-04-26 530-487-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHICO CA
2011-04-26 530-487-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHICO CA
2011-04-20 530-457-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GEORGETOWN CA
2011-04-18 530-239-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT SHASTA CA
2011-04-15 530-710-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C REDDING CA
2011-04-14 530-330-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WILLOWS CA
2011-04-14 530-712-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OROVILLE CA
2011-04-14 530-936-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ORLAND CA
2011-04-13 530-384-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOSMOLINOS CA
2011-04-07 530-801-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2011-04-07 530-822-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2011-04-04 530-470-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NEVADACITY CA
2011-03-30 530-500-1XXX 1000–1999Assigned SNOWCREST TELEPHONE, INC -CA 103G DUNSMUIR CA
2011-03-25 530-208-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SOUTHTAHOE CA
2011-03-25 530-314-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SOUTHTAHOE CA
2011-03-25 530-386-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TRUCKEE CA
2011-03-25 530-525-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HOMEWOOD CA
2011-03-23 530-600-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SOUTHTAHOE CA
2011-03-21 530-558-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SHINGLESPG CA
2011-03-21 530-748-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLVL WEST CA
2011-03-11 530-531-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BIGGS CA
2011-03-08 530-710-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2011-03-02 530-777-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MARYSVILLE CA
2011-03-02 530-777-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MARYSVILLE 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.