NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-05-04 512-882 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C GEORGETOWN TX
2022-05-04 512-885 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C LOCKHART TX
2022-05-04 567-385 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TOLEDO OH
2022-05-04 579-826 not yet reported which blocks → TELUS Quebec 2243 Mirabel-St-Augustin —
2022-05-04 620-601 0XXX1XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PRATT KS
2022-05-04 629-275 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NASHVILLE TN
2022-05-04 713-379 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C APOLLO TX
2022-05-04 713-399 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HOUSTON TX
2022-05-04 713-424 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BAYTOWN TX
2022-05-04 718-750 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN11 NY
2022-05-04 725-274 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2022-05-04 785-634 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CUBA KS
2022-05-04 832-346 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BAMMEL TX
2022-05-04 832-936 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HSTNSUBURB TX
2022-05-04 832-979 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HUMBLE TX
2022-05-04 917-271 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN03 NY
2022-05-04 917-590 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN09 NY
2022-05-04 917-694 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN10 NY
2022-05-04 917-967 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN07 NY
2022-05-04 929-619 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN03 NY
2022-05-04 929-621 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN07 NY
2022-05-04 945-254 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PLANO TX
2022-05-04 949-978 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H IRVINE CA
2022-05-04 954-264 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H FTLAUDERDL FL
2022-05-04 954-841 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H POMPANOBCH FL
2022-05-04 954-886 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H CORAL SPG FL
2022-05-04 972-640 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C GRANDPRARI TX
2022-05-04 972-928 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C FRISCO TX
2022-05-04 985-356 0XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GOLDEN MDW LA
2022-05-03 303-491 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H DENVER CO
2022-05-03 468-400 not yet reported which blocks → IXICA Communications Inc. 812H Cookshire —
2022-05-03 468-444 not yet reported which blocks → IXICA Communications Inc. 812H Danville —
2022-05-03 468-488 not yet reported which blocks → IXICA Communications Inc. 812H Windsor —
2022-05-03 468-600 not yet reported which blocks → IXICA Communications Inc. 812H East Angus —
2022-05-03 468-680 not yet reported which blocks → IXICA Communications Inc. 812H Wotton —
2022-05-02 365-433 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2022-05-02 468-200 not yet reported which blocks → IXICA Communications Inc. 812H Bishopton —
2022-05-02 468-222 not yet reported which blocks → IXICA Communications Inc. 812H Bromptonville —
2022-05-02 468-300 not yet reported which blocks → IXICA Communications Inc. 812H Bury —
2022-05-02 468-333 not yet reported which blocks → IXICA Communications Inc. 812H Chartierville —
2022-05-02 564-218 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2022-05-02 564-221 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BATTLEGRND WA
2022-05-02 825-544 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2022-05-02 825-740 not yet reported which blocks → Bell Mobility 6574 Calgary —
2022-04-29 236-780 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2022-04-29 312-680 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2022-04-29 404-517 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2022-04-29 404-868 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2022-04-29 437-650 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-04-29 442-372 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OCSD CRLS CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.