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
2017-03-20 209-638 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H TURLOCK CA
2017-03-20 224-322 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2017-03-20 224-529 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GLENVIEW IL
2017-03-20 309-316 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C DELAVAN IL
2017-03-20 317-526 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2017-03-20 331-226 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NAPERVILLE IL
2017-03-20 516-271 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H NASSAUZN08 NY
2017-03-20 585-407 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H VICTOR NY
2017-03-20 585-513 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H BERGEN NY
2017-03-20 657-323 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2017-03-20 754-228 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H FTLAUDERDL FL
2017-03-20 803-683 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 COLUMBIA SC
2017-03-20 810-242 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORT HURON MI
2017-03-20 929-448 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H NWYRCYZN04 NY
2017-03-20 941-402 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SARASOTA FL
2017-03-20 984-365 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 RALEIGH NC
2017-03-17 424-528 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CMTN GRDN CA
2017-03-17 559-705 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H FRESNO CA
2017-03-17 585-541 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C CASTILE NY
2017-03-17 607-357 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C ARKPORT NY
2017-03-17 607-360 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C CANISTEO NY
2017-03-17 607-361 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C CORNING NY
2017-03-17 607-364 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C DAVENPORT NY
2017-03-17 607-367 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C ELMIRA NY
2017-03-17 607-388 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C HOBART NY
2017-03-17 607-389 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C HORNELL NY
2017-03-17 650-536 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H SNFC JUNPR CA
2017-03-17 657-356 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H SANTA ANA CA
2017-03-17 727-261 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H NWPTRICHEY FL
2017-03-17 804-455 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H CUMBERLAND VA
2017-03-17 806-905 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MID-PLAINS RURAL TEL COOP DBA MID-PLAINS COMM-TX 982H LUBBOCK TX
2017-03-17 916-269 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H RIO LINDA CA
2017-03-17 925-532 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H WALNUT CRK CA
2017-03-17 925-536 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H CONCORD CA
2017-03-17 929-206 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2017-03-17 941-248 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SARASOTA FL
2017-03-17 970-678 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 5972 BASALT CO
2017-03-17 980-699 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E MONROE NC
2017-03-16 331-219 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H AURORA IL
2017-03-16 346-259 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAYTOWN TX
2017-03-16 346-493 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2017-03-16 346-606 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2017-03-16 361-495 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HEBBRONVL TX
2017-03-16 431-805 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2017-03-16 431-884 not yet reported which blocks → Westman Media Cooperative Ltd 120F Shoal Lake —
2017-03-16 431-888 not yet reported which blocks → Westman Media Cooperative Ltd 120F Russell —
2017-03-16 438-903 not yet reported which blocks → Bell Mobility 6574 Montreal —
2017-03-16 504-334 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2017-03-16 587-908 not yet reported which blocks → Bell Mobility 6574 Calgary —
2017-03-16 612-357 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN

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.