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
2018-12-19 870-601 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C MONETTE AR
2018-12-19 929-498 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN09 NY
2018-12-19 949-503 0–9 XXXall 10 · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L CAPITRNVLY CA
2018-12-19 959-900 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J HARTFORD CT
2018-12-18 226-639 not yet reported which blocks → Iristel Inc. 154E Belmont —
2018-12-18 236-419 not yet reported which blocks → Shaw Telecom Inc. 497E Merritt —
2018-12-18 401-799 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J PROVIDENCE RI
2018-12-18 401-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J PROVIDENCE RI
2018-12-18 407-713 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ORLANDO FL
2018-12-18 416-672 not yet reported which blocks → TekSavvy Solutions Inc 548H Toronto —
2018-12-18 431-380 not yet reported which blocks → Shaw Telecom Inc. 497E Macgregor —
2018-12-18 438-409 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2018-12-18 438-410 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2018-12-18 504-375 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D KENNER LA
2018-12-18 825-420 not yet reported which blocks → Shaw Telecom Inc. 497E Drayton Valley —
2018-12-17 217-920 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DANVILLE IL
2018-12-17 267-845 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D PHLDLPHZN4 PA
2018-12-17 314-586 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2018-12-17 336-968 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D WINSTN SAL NC
2018-12-17 346-374 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D HSTNSUBURB TX
2018-12-17 385-292 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2018-12-17 417-814 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2018-12-17 435-395 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HEBER CITY UT
2018-12-17 470-530 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2018-12-17 548-887 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Woodstock —
2018-12-17 650-414 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 REDWOOD CY CA
2018-12-17 825-421 not yet reported which blocks → Shaw Telecom Inc. 497E Hinton —
2018-12-17 825-422 not yet reported which blocks → Shaw Telecom Inc. 497E Jasper —
2018-12-17 873-668 not yet reported which blocks → Videotron Ltd. 8306 Lyster —
2018-12-17 873-669 not yet reported which blocks → Videotron Ltd. 8306 Laurierville —
2018-12-17 939-444 0XXX1XXX2XXX3XXX4XXX5XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G ROOSEVLTRD PR
2018-12-17 939-666 0XXX1XXX2XXX3XXX6XXX7XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G SANSBSTIAN PR
2018-12-17 939-888 0XXX1XXX3XXX7XXX8XXX · 5 holders which blocks → NATURAL G.C. INC. - PR 985G LASPIEDRAS PR
2018-12-17 939-900 0–9 XXXall 10 · 3 holders which blocks → NATURAL G.C. INC. - PR 985G PONCE PR
2018-12-17 939-999 0XXX1XXX2XXX3XXX8XXX9XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G AGUASBUNAS PR
2018-12-13 267-667 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PHLDLPHZN1 PA
2018-12-13 313-751 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2018-12-13 380-235 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 COLUMBUS OH
2018-12-13 425-705 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2018-12-13 425-722 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2018-12-13 437-251 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2018-12-13 437-252 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2018-12-13 437-916 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Toronto —
2018-12-13 437-917 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Toronto —
2018-12-13 437-918 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Toronto —
2018-12-13 505-808 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J ALBUQURQUE NM
2018-12-13 612-422 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2018-12-13 680-210 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WATERTOWN NY
2018-12-13 713-804 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2018-12-13 719-490 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEVISTA CO

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.