NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2023-06-15 773-300 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C CHICGOZN05 IL
2023-06-15 773-500 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN10 IL
2023-06-15 786-993 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-15 786-994 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-15 786-995 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-15 786-996 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-15 786-997 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-15 803-843 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWELLENTN SC
2023-06-15 814-570 0XXX1XXX2XXX · 3 holders which blocks → ONVOY, LLC - PA 547E OSCEOLA ML PA
2023-06-15 814-582 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC - PA 547E HASTINGS PA
2023-06-15 814-716 0XXX1XXX2XXX · 3 holders which blocks → ONVOY, LLC - PA 547E PTALLEGANY PA
2023-06-15 860-981 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WATERTOWN CT
2023-06-15 870-923 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BLYTHEVL AR
2023-06-15 872-217 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN08 IL
2023-06-15 912-731 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOUGLAS GA
2023-06-15 951-632 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HEMT SNJC CA
2023-06-15 971-452 4XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 BEAVER OR
2023-06-14 318-530 0XXX1XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CALHOUN LA
2023-06-14 319-416 0XXX1XXX · 2 holders which blocks → NUSO, LLC 732J VINTON IA
2023-06-14 332-276 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2023-06-14 346-672 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2023-06-14 365-357 not yet reported which blocks → Videotron Ltd. 328F Hamilton —
2023-06-14 365-358 not yet reported which blocks → Videotron Ltd. 328F Oshawa —
2023-06-14 380-456 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2023-06-14 380-457 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2023-06-14 380-458 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2023-06-14 380-459 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2023-06-14 380-460 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2023-06-14 475-203 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CT 639C WALLINGFD CT
2023-06-14 475-375 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C NEW HAVEN CT
2023-06-14 515-940 0XXX1XXX6XXX9XXX · 3 holders which blocks → NUSO, LLC 732J DES MOINES IA
2023-06-14 548-390 not yet reported which blocks → Videotron Ltd. 328F Kitchener-Waterloo —
2023-06-14 548-391 not yet reported which blocks → Videotron Ltd. 328F London —
2023-06-14 559-849 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J O NEALS CA
2023-06-14 667-890 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ODENTON MD
2023-06-14 667-891 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ODENTON MD
2023-06-14 667-892 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ODENTON MD
2023-06-14 667-893 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ODENTON MD
2023-06-14 667-894 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ODENTON MD
2023-06-14 769-696 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H WAYNESBORO MS
2023-06-14 862-423 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWARK NJ
2023-06-14 917-245 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN13 NY
2023-06-14 929-684 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2023-06-14 929-685 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2023-06-14 929-686 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2023-06-14 945-298 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CARROLLTON TX
2023-06-13 223-314 0XXX1XXX2XXX9XXX which blocks → ONVOY, LLC - PA 547E LITTLESTN PA
2023-06-13 223-318 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - PA 547E YORK SPG PA
2023-06-13 248-517 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2023-06-13 341-233 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.