NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-07-20 682-361 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY TX
2023-07-20 724-724 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 BADEN PA
2023-07-20 762-368 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 THOMASTON GA
2023-07-20 779-372 0XXX1XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 DIXON IL
2023-07-20 779-373 0XXX1XXX8XXX9XXX · 2 holders which blocks → CALLWORKS CORPORATION 475J ROCKFORD IL
2023-07-20 806-838 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → MID-PLAINS RURAL TEL COOP DBA MID-PLAINS COMM-TX 982H CANYON TX
2023-07-20 820-218 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LOMPOC CA
2023-07-20 828-730 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HENDERSNVL NC
2023-07-20 835-221 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 POTTSTOWN PA
2023-07-20 845-973 0XXX which blocks → ONVOY SPECTRUM, LLC 624H GARRISON NY
2023-07-20 845-995 0XXX which blocks → ONVOY SPECTRUM, LLC 624H GRAHAMSVL NY
2023-07-20 864-831 0XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 UNION SC
2023-07-20 872-331 0–9 XXXall 10 · 4 holders which blocks → CALLWORKS CORPORATION 475J CHICGOZN02 IL
2023-07-20 873-257 not yet reported which blocks → Bell Canada 984C Becancour —
2023-07-20 873-356 not yet reported which blocks → Bell Canada 984C Gentilly —
2023-07-20 873-364 not yet reported which blocks → Bell Canada 984C Mont-Laurier —
2023-07-20 873-418 not yet reported which blocks → Bell Canada 984C St-Gregoire —
2023-07-20 938-216 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2023-07-19 317-765 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2023-07-19 346-683 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C WESTFIELD TX
2023-07-19 410-478 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 414-300 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MILWAUKZN1 WI
2023-07-19 534-217 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - WI 225C MERRILLAN WI
2023-07-19 667-438 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CATONSVL MD
2023-07-19 864-825 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SPARTANBG SC
2023-07-19 917-431 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2023-07-19 929-696 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2023-07-19 929-697 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN05 NY
2023-07-19 929-698 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2023-07-19 929-701 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2023-07-19 929-702 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN14 NY
2023-07-19 929-703 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2023-07-19 929-704 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN13 NY
2023-07-19 929-705 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN15 NY
2023-07-19 956-709 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BROWNSVL TX
2023-07-18 209-517 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 JAMESTOWN CA
2023-07-18 215-445 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN2 PA
2023-07-18 339-239 0XXX1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D BRYANTVL MA
2023-07-18 352-850 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H OCALA FL
2023-07-18 365-439 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-07-18 404-779 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2023-07-18 447-259 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATTOON IL
2023-07-18 464-224 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2023-07-18 464-225 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2023-07-18 479-515 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
2023-07-18 479-516 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTONVL AR
2023-07-18 479-517 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
2023-07-18 505-572 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2023-07-18 561-934 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C WPALMBEACH FL
2023-07-18 571-648 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.