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
2014-09-11 928-216-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PARKER AZ
2014-09-11 928-362-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2014-09-11 928-792-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2014-09-10 928-487-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-09-10 928-487-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-09-09 928-440-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E FLAGSTAFF AZ
2014-09-09 928-440-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E FLAGSTAFF AZ
2014-09-05 928-756-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PRESCOTT AZ
2014-09-05 928-756-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PRESCOTT AZ
2014-09-02 928-383-0XXX 0000–0999Assigned SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 CHINLE AZ
2014-08-19 928-298-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PIMA AZ
2014-08-18 928-414-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 HOLBROOK AZ
2014-08-11 928-230-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 LKHAVASUCY AZ
2014-08-11 928-733-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 LKHAVASUCY AZ
2014-08-11 928-963-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2014-08-04 928-247-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2014-08-04 928-667-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PARKER DAM AZ
2014-07-25 928-295-9XXX 9000–9999Assigned AT&T - LOCAL 7421 SEDONA AZ
2014-07-17 928-482-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GILA BEND AZ
2014-07-15 928-299-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2014-07-15 928-362-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAFFORD AZ
2014-07-10 928-227-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2014-07-10 928-910-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2014-07-01 928-440-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2014-06-27 928-723-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 YUMA AZ
2014-06-25 928-517-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PAYSON AZ
2014-06-10 928-662-6XXX 6000–6999Assigned CSC VOICE, LLC 612K PARKER DAM AZ
2014-06-06 928-318-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E YUMA AZ
2014-04-14 928-299-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
2014-04-08 928-259-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K YUMA AZ
2014-04-07 928-215-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CLIFTON AZ
2014-04-07 928-910-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PRESCOTT AZ
2014-04-01 928-351-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-03-26 928-460-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PRESCOTT AZ
2014-03-18 928-278-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2014-03-17 928-851-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F BOUSE AZ
2014-03-07 928-723-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2014-03-06 928-278-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 BULLHEADCY AZ
2014-03-03 928-421-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2014-03-03 928-421-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2014-02-26 928-288-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2014-02-26 928-575-1XXX 1000–1999Assigned CSC VOICE, LLC 612K PARKER AZ
2014-02-26 928-923-5XXX 5000–5999Assigned CSC VOICE, LLC 612K EHRENBERG AZ
2014-02-25 928-275-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-02-25 928-482-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GILA BEND AZ
2014-02-25 928-575-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PARKER AZ
2014-02-25 928-793-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2014-02-25 928-923-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F EHRENBERG AZ
2014-02-18 928-404-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 BULLHDCYN AZ
2014-02-18 928-566-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 LKHAVASUCY 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.