NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-03-22 581-704 not yet reported which blocks → Iristel Inc. 154E Quebec —
2012-03-22 587-437 not yet reported which blocks → Bell Mobility 6574 Calgary —
2012-03-22 604-337 not yet reported which blocks → Iristel Inc. 154E Richmond —
2012-03-22 619-354 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG SNDG CA
2012-03-22 707-388 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C ARCATA CA
2012-03-22 816-466 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J OAK GROVE MO
2012-03-22 819-414 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2012-03-22 902-398 not yet reported which blocks → Bell Mobility Aliant 329A New Germany —
2012-03-22 917-819 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN03 NY
2012-03-22 989-368 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HARRISON MI
2012-03-21 289-498 not yet reported which blocks → Fibernetics Corporation 464D Brampton —
2012-03-21 289-904 not yet reported which blocks → Iristel Inc. 154E Malton —
2012-03-21 289-907 not yet reported which blocks → Iristel Inc. 154E King City —
2012-03-21 352-501 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CENTURYLINK OF FLORIDA, INC. (UNITED) 0341 CRYSTALRIV FL
2012-03-21 361-447 not yet reported which blocks → VTX COMMUNICATIONS, LLC 776A GEORGEWEST TX
2012-03-21 361-784 not yet reported which blocks → VTX COMMUNICATIONS, LLC 776A THREERIVRS TX
2012-03-21 579-500 not yet reported which blocks → Iristel Inc. 154E Joliette —
2012-03-21 579-800 not yet reported which blocks → Iristel Inc. 154E Laprairie —
2012-03-21 612-315 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F TWINCITIES MN
2012-03-21 613-519 not yet reported which blocks → Iristel Inc. 154E Kanata-Stittsville —
2012-03-21 614-981 0–9 XXXall 10 · 2 holders which blocks → CITYNET OHIO, LLC - OH 036B COLUMBUS OH
2012-03-21 651-409 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F SCANDIMRIN MN
2012-03-21 778-450 not yet reported which blocks → TELUS 8086 Cranbrook —
2012-03-21 902-705 not yet reported which blocks → Iristel Inc. 154E Halifax —
2012-03-20 343-882 not yet reported which blocks → Fibernetics Corporation 464D Ottawa-Hull —
2012-03-20 438-738 not yet reported which blocks → Fibernetics Corporation 464D Montreal —
2012-03-20 438-818 not yet reported which blocks → Fibernetics Corporation 464D Ste-Genevieve —
2012-03-20 438-819 not yet reported which blocks → Fibernetics Corporation 464D Lachine —
2012-03-20 450-497 not yet reported which blocks → Iristel Inc. 154E Chomedey —
2012-03-20 581-681 not yet reported which blocks → Fibernetics Corporation 464D Quebec —
2012-03-20 587-409 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2012-03-20 587-410 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2012-03-20 681-242 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FALLNGWTRS WV
2012-03-20 706-784 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ROME GA
2012-03-20 757-738 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J NRFOLKZON3 VA
2012-03-20 778-382 not yet reported which blocks → Fibernetics Corporation 464D North Vancouver —
2012-03-20 807-789 not yet reported which blocks → Iristel Inc. 154E Fort Frances —
2012-03-20 808-278 0–9 XXXall 10 · 6 holders which blocks → HAWAIIAN TELCOM, INC. - HI 3100 LIHUE HI
2012-03-20 808-515 0–9 XXXall 10 · 4 holders which blocks → HAWAIIAN TELCOM, INC. - HI 3100 LANAI CITY HI
2012-03-20 808-556 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → HAWAIIAN TELCOM, INC. - HI 3100 KAUNAKAKAI HI
2012-03-20 808-799 0–9 XXXall 10 · 3 holders which blocks → HAWAIIAN TELCOM, INC. - HI 3100 HONOLULU HI
2012-03-20 808-866 0–9 XXXall 10 · 3 holders which blocks → HAWAIIAN TELCOM, INC. - HI 3100 WAILUKU HI
2012-03-19 206-477 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9638 SEATTLE WA
2012-03-19 226-401 not yet reported which blocks → Iristel Inc. 154E Brantford —
2012-03-19 289-306 not yet reported which blocks → Iristel Inc. 154E Markham —
2012-03-19 289-796 not yet reported which blocks → Iristel Inc. 154E Aurora —
2012-03-19 312-508 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN01 IL
2012-03-19 401-406 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2012-03-19 438-700 not yet reported which blocks → Iristel Inc. 154E Ile-Perrot —
2012-03-19 450-489 not yet reported which blocks → Iristel Inc. 154E Chambly —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.