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
2018-05-24 928-310-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2018-05-15 928-264-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F EHRENBERG AZ
2018-05-04 928-294-8XXX 8000–8999Assigned METROPCS, INC. 5562 YUMA AZ
2018-05-04 928-582-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2018-04-27 928-813-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F GLOBE AZ
2018-04-26 928-412-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 LKHAVASUCY AZ
2018-04-25 928-543-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WICKENBURG AZ
2018-04-25 928-612-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PAGE AZ
2018-04-25 928-679-1XXX 1000–1999Assigned SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 FLAGSTAFF AZ
2018-04-19 928-316-9XXX 9000–9999Assigned TELNYX LLC 073H PIMA AZ
2018-04-19 928-331-9XXX 9000–9999Assigned TELNYX LLC 073H GILA BEND AZ
2018-04-19 928-693-1XXX 1000–1999Assigned TELNYX LLC 073H PAGE AZ
2018-03-19 928-316-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PIMA AZ
2018-03-14 928-236-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SOMERTON AZ
2018-03-14 928-291-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2018-03-13 928-529-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2018-03-13 928-940-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PINETOP AZ
2018-03-05 928-256-6XXX 6000–6999Assigned METROPCS, INC. 5562 YUMA AZ
2018-02-20 928-963-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SEDONA AZ
2018-01-15 928-892-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SHOW LOW AZ
2018-01-05 928-770-0XXX 0000–0999Assigned CSC VOICE, LLC 612K MOHAVE VLY AZ
2018-01-04 928-293-4XXX 4000–4999Assigned HD CARRIER LLC 321J KINGMAN AZ
2018-01-04 928-293-6XXX 6000–6999Assigned HD CARRIER LLC 321J KINGMAN AZ
2018-01-04 928-293-8XXX 8000–8999Assigned HD CARRIER LLC 321J KINGMAN AZ
2018-01-04 928-293-9XXX 9000–9999Assigned HD CARRIER LLC 321J KINGMAN AZ
2018-01-04 928-529-1XXX 1000–1999Assigned HD CARRIER LLC 321J KINGMAN AZ
2017-12-29 928-323-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SOMERTON AZ
2017-12-21 928-294-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 YUMA AZ
2017-12-05 928-326-7XXX 7000–7999Assigned SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 FLAGSTAFF AZ
2017-11-20 928-291-8XXX 8000–8999Assigned METROPCS, INC. 5562 YUMA AZ
2017-11-15 928-294-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K YUMA AZ
2017-11-09 928-961-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 GLOBE AZ
2017-10-11 928-225-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2017-09-27 928-252-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J LKPLEASANT AZ
2017-09-27 928-296-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 BULLHEADCY AZ
2017-09-27 928-326-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2017-09-27 928-326-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2017-09-14 928-323-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SOMERTON AZ
2017-08-15 928-529-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2017-08-14 928-351-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E GLOBE AZ
2017-07-24 928-888-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 GRANDCNYON AZ
2017-07-18 928-582-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2017-07-07 928-564-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 MEADVIEW AZ
2017-06-30 928-350-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2017-06-30 928-458-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PRESCOTT AZ
2017-06-29 928-326-5XXX 5000–5999Assigned SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 FLAGSTAFF AZ
2017-06-19 928-882-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WINSLOW AZ
2017-06-12 928-239-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEDONA AZ
2017-06-12 928-291-1XXX 1000–1999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F YUMA AZ
2017-06-12 928-326-2XXX 2000–2999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F FLAGSTAFF 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.