NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

31 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 16
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
2008-09-09 530-334-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GEORGETOWN CA
2008-09-09 530-513-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2008-09-09 530-605-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2008-09-09 530-643-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 YREKA CA
2008-09-05 530-586-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORNING CA
2008-09-05 530-615-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GRVY MAIN CA
2008-08-25 530-387-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHINGLESPG CA
2008-08-19 530-361-8XXX 8000–8999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 WILLOWS CA
2008-08-19 530-553-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NTAH BCWY CA
2008-08-19 530-567-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 RED BLUFF CA
2008-08-19 530-580-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NTAH THCY CA
2008-08-05 530-366-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RED BLUFF CA
2008-08-05 530-605-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2008-08-04 530-665-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WOODLAND CA
2008-07-24 530-588-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2008-07-24 530-645-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARYSVILLE CA
2008-07-16 530-282-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OROVILLE CA
2008-07-11 530-249-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUSANVILLE CA
2008-07-11 530-513-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2008-06-30 530-554-6XXX 6000–6999Assigned METROPCS, INC. 5562 DAVIS CA
2008-06-30 530-923-6XXX 6000–6999Assigned METROPCS, INC. 5562 MARYSVILLE CA
2008-06-30 530-923-9XXX 9000–9999Assigned METROPCS, INC. 5562 MARYSVILLE CA
2008-06-27 530-870-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MARYSVILLE CA
2008-06-27 530-870-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MARYSVILLE CA
2008-06-25 530-605-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K REDDING CA
2008-06-25 530-615-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRVY MAIN CA
2008-06-25 530-838-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORNING CA
2008-06-20 530-748-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PLVL WEST CA
2008-06-19 530-550-6XXX 6000–6999Assigned PACIFIC BELL 9740 TRUCKEE CA
2008-06-04 530-414-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TRUCKEE CA
2008-05-23 530-387-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SHINGLESPG CA
2008-05-23 530-723-5XXX 5000–5999Assigned ASTOUND BROADBAND, LLC - CA 485E WOODLAND CA
2008-05-20 530-513-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2008-05-20 530-933-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2008-05-07 530-210-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AUBN MAIN CA
2008-05-07 530-605-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDDING CA
2008-05-07 530-903-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLVL WEST CA
2008-05-06 530-588-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHICO CA
2008-05-02 530-840-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RED BLUFF CA
2008-04-24 530-845-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MARYSVILLE CA
2008-04-21 530-643-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 YREKA CA
2008-04-18 530-448-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NTAH THCY CA
2008-04-14 530-513-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHICO CA
2008-04-08 530-566-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2008-04-07 530-366-4XXX 4000–4999Assigned METROPCS, INC. 5562 RED BLUFF CA
2008-04-07 530-563-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TRUCKEE CA
2008-04-03 530-636-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHICO CA
2008-03-19 530-923-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2008-03-18 530-665-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODLAND CA
2008-03-13 530-776-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANDERSON 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.