NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-09-30 929-437 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2016-09-30 929-438 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN10 NY
2016-09-30 949-522 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2016-09-30 972-903 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAXAHACHIE TX
2016-09-29 267-673 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA
2016-09-29 267-674 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2016-09-29 267-924 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2016-09-29 475-319 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2016-09-29 579-601 not yet reported which blocks → Bell Canada 8050 Chateauguay —
2016-09-29 579-602 not yet reported which blocks → Bell Canada 8050 Granby —
2016-09-29 579-603 not yet reported which blocks → Bell Canada 8050 Joliette —
2016-09-29 579-604 not yet reported which blocks → Bell Canada 8050 L'Epiphanie-l'Assomption —
2016-09-29 579-605 not yet reported which blocks → Bell Canada 8050 Pont-Viau —
2016-09-29 579-606 not yet reported which blocks → Bell Canada 8050 Sorel —
2016-09-29 579-607 not yet reported which blocks → Bell Canada 8050 St-Eustache —
2016-09-29 579-608 not yet reported which blocks → Bell Canada 8050 St-Hyacinthe —
2016-09-29 873-481 not yet reported which blocks → ISP Telecom Inc. 4727 Arundel —
2016-09-29 929-436 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2016-09-28 240-302 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2016-09-28 262-693 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MILWAUKZN2 WI
2016-09-28 270-693 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E JORDAN KY
2016-09-28 272-208 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POTTSVILLE PA
2016-09-28 272-219 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MT POCONO PA
2016-09-28 331-385 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AURORA IL
2016-09-28 409-244 0XXX4XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HAMSHIRE TX
2016-09-28 469-381 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARROLLTON TX
2016-09-28 682-246 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-09-28 702-213 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F SEARCHLIHT NV
2016-09-28 702-559 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 LAS VEGAS NV
2016-09-28 702-805 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2016-09-28 779-230 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOLIET IL
2016-09-27 202-869 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - DC 074F WSHNGTNZN1 DC
2016-09-27 213-328 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 01 CA
2016-09-27 224-271 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 LAKEFOREST IL
2016-09-27 249-594 not yet reported which blocks → TELUS Mobility 8303 Alliston —
2016-09-27 260-234 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FORT WAYNE IN
2016-09-27 365-207 not yet reported which blocks → Distributel 082E Cooksville —
2016-09-27 365-778 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oakville —
2016-09-27 431-996 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2016-09-27 431-997 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2016-09-27 484-516 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 READING PA
2016-09-27 667-215 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J ELKTON MD
2016-09-27 778-247 not yet reported which blocks → Distributel 081E Victoria —
2016-09-27 778-326 not yet reported which blocks → Distributel 081E Richmond —
2016-09-27 812-850 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NEW ALBANY IN
2016-09-27 830-327 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 NEWBRANFLS TX
2016-09-26 234-219 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DALTON OH
2016-09-26 323-925 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-26 336-666 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F WINSTN SAL NC
2016-09-26 510-570 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OKLD BKLY CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.