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
2017-08-09 469-318 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2017-08-09 504-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H NEWORLEANS LA
2017-08-09 579-802 not yet reported which blocks → Iristel Inc. 154E Valleyfield —
2017-08-09 587-570 not yet reported which blocks → Iristel Inc. 154E St. Albert —
2017-08-09 626-406 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL MONTE CA
2017-08-09 636-331 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FSSCRSTLCY MO
2017-08-09 782-800 not yet reported which blocks → Iristel Inc. 154E Sydney —
2017-08-09 803-977 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H COLUMBIA SC
2017-08-09 804-533 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E RICHMOND VA
2017-08-09 808-400 0–9 XXXwhole prefix which blocks → ONVOY, LLC - HI 210H HONOLULU HI
2017-08-09 816-551 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KEARNEY MO
2017-08-09 864-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H GREENVILLE SC
2017-08-09 901-295 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E MEMPHIS TN
2017-08-09 916-619 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SCRM MAIN CA
2017-08-08 216-290 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2017-08-08 249-702 not yet reported which blocks → Iristel Inc. 154E Lindsay —
2017-08-08 267-703 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2017-08-08 270-551 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E JORDAN KY
2017-08-08 331-232 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 W CHICAGO IL
2017-08-08 365-660 not yet reported which blocks → Iristel Inc. 154E St. Catharines-Thorold —
2017-08-08 470-566 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA NE GA
2017-08-08 504-399 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2017-08-08 579-401 not yet reported which blocks → Iristel Inc. 154E Marieville —
2017-08-08 608-925 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHWAYNE WI
2017-08-08 813-544 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C TAMPACEN FL
2017-08-08 857-292 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-08-08 857-295 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-08-08 929-470 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN07 NY
2017-08-07 213-306 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2017-08-07 234-235 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORTLAND OH
2017-08-07 307-522 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - WY 581H ROCK SPG WY
2017-08-07 319-264 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - IA 6266 OELWEIN IA
2017-08-07 331-231 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NAPERVILLE IL
2017-08-07 385-381 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON UT
2017-08-07 424-310 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D HAWTHORNE CA
2017-08-07 430-232 2XXX6XXX7XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J RICHLAND TX
2017-08-07 470-544 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2017-08-07 480-571 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2017-08-07 502-901 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H LOUISVILLE KY
2017-08-07 510-519 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2017-08-07 530-449 7XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OAK RUN CA
2017-08-07 530-849 7XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SHINGLETN CA
2017-08-07 585-510 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-07 708-549 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORLAND IL
2017-08-07 774-349 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FALMOUTH MA
2017-08-07 857-291 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-08-07 951-419 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MORENO CA
2017-08-04 272-483 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E MILTON PA
2017-08-04 385-447 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-08-04 406-402 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREATFALLS MT

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.