NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2022-09-30 734-706 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLEVILLE MI
2022-09-30 808-229 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2022-09-29 217-261 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MATTOON IL
2022-09-29 223-301 4XXX which blocks → COMCAST IP PHONE, LLC 318J REEDSVILLE PA
2022-09-29 223-304 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NEWVILLE PA
2022-09-29 352-755 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MOUNT DORA FL
2022-09-29 368-996 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2022-09-29 405-363 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2022-09-29 405-978 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2022-09-29 417-514 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CARTHAGE MO
2022-09-29 448-212 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E CRAWFORDVL FL
2022-09-29 548-766 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Essex —
2022-09-29 603-649 7XXX which blocks → COMCAST IP PHONE, LLC 318J JAFFREY NH
2022-09-29 646-646 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2022-09-29 681-451 0XXX1XXX2XXX3XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BUFFALO WV
2022-09-29 719-692 2XXX7XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 CRIPPLECRK CO
2022-09-29 727-425 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NWPTRICHEY FL
2022-09-29 770-524 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2022-09-29 772-273 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E HOBE SOUND FL
2022-09-29 772-274 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E JENSEN BCH FL
2022-09-29 782-725 not yet reported which blocks → Iristel Inc. 154E Port Hawkesbury —
2022-09-29 910-910 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E JACKSONVL NC
2022-09-28 209-209 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C MODESTO CA
2022-09-28 209-991 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LIVINGSTON CA
2022-09-28 209-994 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIPON CA
2022-09-28 346-592 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2022-09-28 346-593 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2022-09-28 350-200 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LODI CA
2022-09-28 350-250 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C TRACY CA
2022-09-28 352-935 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E GROVELAND FL
2022-09-28 361-361 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BISHOP TX
2022-09-28 409-409 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C FANNETT TX
2022-09-28 448-210 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHIPLEY FL
2022-09-28 612-489 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2022-09-28 662-662 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MS 719E MEMPHIS MS
2022-09-28 667-414 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2022-09-28 737-339 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F TAYLOR TX
2022-09-28 830-297 0XXX1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CARRIZOSPG TX
2022-09-28 830-369 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2022-09-28 830-830 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C DEL RIO TX
2022-09-28 854-585 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BLENHEIM SC
2022-09-28 940-940 0XXX1XXX2XXX3XXX8XXX9XXX which blocks → ONVOY, LLC - TX 903C AUBREY TX
2022-09-27 251-251 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - AL 604E JACKSON AL
2022-09-27 254-254 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C SALADO TX
2022-09-27 319-319 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IA 221F IOWA CITY IA
2022-09-27 337-337 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E LEESVILLE LA
2022-09-27 501-501 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AR 348F HOTSPRINGS AR
2022-09-27 504-504 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2022-09-27 509-509 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WA 483E YAKIMA WA
2022-09-27 562-562 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C NORWALK CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.