NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 928
INTRADO COMMUNICATIONS, LLC 3
CSC WIRELESS, LLC 2
AHOI LLC 2
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 1
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
2015-03-17 928-605-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
2015-03-10 928-323-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E SOMERTON AZ
2015-03-10 928-615-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E YUMA AZ
2015-03-05 928-299-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2015-02-25 928-615-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2015-02-09 928-254-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 SEDONA AZ
2015-01-26 928-312-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 INCRPTCNYN AZ
2015-01-26 928-985-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2015-01-26 928-985-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2015-01-26 928-985-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2015-01-23 928-404-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 BULLHDCYN AZ
2015-01-20 928-421-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2015-01-20 928-421-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2015-01-20 928-421-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2015-01-20 928-615-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2015-01-20 928-683-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GILA BEND AZ
2015-01-15 928-662-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PARKER DAM AZ
2015-01-14 928-662-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PARKER DAM AZ
2015-01-07 928-299-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2014-12-29 928-220-2XXX 2000–2999Assigned METROPCS, INC. 5562 FLAGSTAFF AZ
2014-12-19 928-285-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SOMERTON AZ
2014-12-15 928-298-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PIMA AZ
2014-12-11 928-216-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PARKER AZ
2014-12-11 928-793-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-12-11 928-793-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-12-11 928-793-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-12-02 928-723-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2014-11-19 928-318-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K YUMA AZ
2014-11-18 928-318-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 YUMA AZ
2014-11-12 928-318-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2014-11-10 928-318-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2014-11-10 928-318-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2014-11-07 928-318-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K YUMA AZ
2014-10-24 928-292-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLIFTON AZ
2014-10-22 928-318-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2014-10-22 928-318-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2014-10-20 928-298-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PIMA AZ
2014-10-20 928-792-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SAFFORD AZ
2014-10-20 928-793-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F GLOBE AZ
2014-10-06 928-298-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PIMA AZ
2014-10-06 928-298-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PIMA AZ
2014-10-03 928-683-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GILA BEND AZ
2014-10-01 928-299-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2014-10-01 928-910-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2014-09-30 928-315-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SOMERTON AZ
2014-09-23 928-278-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 BULLHEADCY AZ
2014-09-17 928-325-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E SEDONA AZ
2014-09-17 928-325-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E SEDONA AZ
2014-09-17 928-612-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PAGE AZ
2014-09-17 928-723-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E YUMA AZ

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.