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
2011-03-10 928-277-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PRESCOTT AZ
2011-03-10 928-379-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PRESCOTT AZ
2011-03-03 928-275-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2011-03-03 928-514-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 BULLHEADCY AZ
2011-02-28 928-515-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PRESCOTT AZ
2011-02-04 928-815-4XXX 4000–4999Assigned NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 4449 WINDOWROCK AZ
2011-02-02 928-287-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2011-02-02 928-817-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2011-01-21 928-514-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2011-01-20 928-919-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K YUMA AZ
2011-01-07 928-433-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E FLAGSTAFF AZ
2011-01-03 928-263-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 KINGMAN AZ
2010-12-20 928-366-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2010-12-20 928-366-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2010-12-20 928-366-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2010-11-02 928-457-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SNOWFLAKE AZ
2010-10-26 928-237-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PRESCOTT AZ
2010-10-19 928-235-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2010-10-18 928-275-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GLOBE AZ
2010-10-18 928-363-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON AZ
2010-09-02 928-235-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAFFORD AZ
2010-08-30 928-351-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2010-08-30 928-351-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2010-08-06 928-679-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2010-08-05 928-263-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2010-07-27 928-514-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2010-07-27 928-514-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2010-07-26 928-237-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PRESCOTT AZ
2010-07-19 928-216-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARKER AZ
2010-07-19 928-302-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2010-07-15 928-224-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WINSLOW AZ
2010-07-15 928-485-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PIMA AZ
2010-06-29 928-238-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PAYSON AZ
2010-06-29 928-589-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINSLOW AZ
2010-06-11 928-235-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SAFFORD AZ
2010-06-07 928-325-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SEDONA AZ
2010-05-13 928-235-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2010-05-13 928-351-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2010-05-06 928-707-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E FLAGSTAFF AZ
2010-04-08 928-817-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E YUMA AZ
2010-03-25 928-366-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E YUMA AZ
2010-03-17 928-259-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2010-03-12 928-235-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SAFFORD AZ
2010-03-11 928-263-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2010-03-10 928-366-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2010-03-05 928-225-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2010-03-05 928-284-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2010-03-05 928-961-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 GLOBE AZ
2010-02-08 928-247-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2010-02-08 928-261-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 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.