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
2021-09-28 928-691-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PAGE AZ
2021-09-24 928-456-0XXX 0000–0999Assigned COMMIO, LLC 939H FLAGSTAFF AZ
2021-09-24 928-456-1XXX 1000–1999Assigned COMMIO, LLC 939H FLAGSTAFF AZ
2021-09-24 928-456-2XXX 2000–2999Assigned COMMIO, LLC 939H FLAGSTAFF AZ
2021-09-24 928-498-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNOWFLAKE AZ
2021-09-24 928-728-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROUGH ROCK AZ
2021-09-22 928-280-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUBA CITY AZ
2021-09-22 928-319-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DILKON AZ
2021-09-22 928-383-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHINLE AZ
2021-09-22 928-423-5XXX 5000–5999Assigned COMMIO, LLC 939H FLAGSTAFF AZ
2021-09-22 928-423-6XXX 6000–6999Assigned COMMIO, LLC 939H FLAGSTAFF AZ
2021-09-22 928-489-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYENTA AZ
2021-09-22 928-653-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RED VALLEY AZ
2021-09-22 928-654-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GREASEWOOD AZ
2021-09-22 928-658-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DENNEHOTSO AZ
2021-09-22 928-659-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROCK POINT AZ
2021-09-22 928-672-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHONTO AZ
2021-09-22 928-673-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAIBITO AZ
2021-09-22 928-686-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEUPP AZ
2021-09-22 928-698-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LE CHEE AZ
2021-09-22 928-724-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TSAILE AZ
2021-09-22 928-725-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PINONCTNWD AZ
2021-09-22 928-730-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FTDEFIANCE AZ
2021-09-22 928-736-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TOYEI AZ
2021-09-22 928-787-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LUKACHUKAI AZ
2021-09-22 928-810-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WINDOWROCK AZ
2021-09-20 928-535-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 HEBER AZ
2021-09-16 928-426-0XXX 0000–0999Assigned COMMIO, LLC 939H PRESCOTT AZ
2021-09-16 928-426-6XXX 6000–6999Assigned COMMIO, LLC 939H PRESCOTT AZ
2021-09-16 928-426-7XXX 7000–7999Assigned COMMIO, LLC 939H PRESCOTT AZ
2021-09-16 928-426-8XXX 8000–8999Assigned COMMIO, LLC 939H PRESCOTT AZ
2021-09-16 928-449-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 LKMHVRNCHS AZ
2021-09-13 928-498-1XXX 1000–1999Assigned COMMIO, LLC 939H SNOWFLAKE AZ
2021-09-13 928-498-8XXX 8000–8999Assigned COMMIO, LLC 939H SNOWFLAKE AZ
2021-09-13 928-498-9XXX 9000–9999Assigned COMMIO, LLC 939H SNOWFLAKE AZ
2021-09-09 928-423-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2021-09-03 928-426-1XXX 1000–1999Assigned IP HORIZON LLC 515J PRESCOTT AZ
2021-09-03 928-430-1XXX 1000–1999Assigned IP HORIZON LLC 515J SOMERTON AZ
2021-09-02 928-381-5XXX 5000–5999Assigned IP HORIZON LLC 515J GRANDCNYON AZ
2021-09-02 928-406-8XXX 8000–8999Assigned IP HORIZON LLC 515J WINSLOW AZ
2021-09-02 928-413-8XXX 8000–8999Assigned IP HORIZON LLC 515J PIMA AZ
2021-09-02 928-417-0XXX 0000–0999Assigned IP HORIZON LLC 515J SAFFORD AZ
2021-09-02 928-423-9XXX 9000–9999Assigned IP HORIZON LLC 515J FLAGSTAFF AZ
2021-09-02 928-471-0XXX 0000–0999Assigned IP HORIZON LLC 515J PAYSON AZ
2021-09-02 928-592-1XXX 1000–1999Assigned IP HORIZON LLC 515J SEDONA AZ
2021-09-02 928-640-8XXX 8000–8999Assigned IP HORIZON LLC 515J PAGE AZ
2021-09-02 928-691-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J PAGE AZ
2021-09-02 928-812-8XXX 8000–8999Assigned IP HORIZON LLC 515J GLOBE AZ
2021-09-02 928-975-8XXX 8000–8999Assigned IP HORIZON LLC 515J YUMA AZ
2021-09-01 928-364-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BLUE RIDGE 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.