NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-02-10 365-685 not yet reported which blocks → IXICA Communications Inc. 812H Ajax-Pickering —
2020-02-10 365-785 not yet reported which blocks → IXICA Communications Inc. 812H St. Catharines-Thorold —
2020-02-10 402-581 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PLATTSMTH NE
2020-02-10 440-634 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 AMHERST OH
2020-02-10 442-314 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-350 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-380 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 470-562 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2020-02-10 562-487 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2020-02-10 609-982 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J ATLNTIC CY NJ
2020-02-10 619-509 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-02-10 626-504 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZUSA CA
2020-02-10 626-526 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZUSA CA
2020-02-10 657-415 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-02-10 657-420 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2020-02-10 657-433 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-02-10 775-466 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J RENO NV
2020-02-10 779-269 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROCKFORD IL
2020-02-10 803-918 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARNWELL SC
2020-02-10 949-513 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAGUNA BCH CA
2020-02-10 952-522 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-02-10 971-368 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUMSVLTRNR OR
2020-02-07 302-277 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW CASTLE DE
2020-02-07 326-200 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MANCHESTER OH
2020-02-07 326-222 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ABERDEEN OH
2020-02-07 326-333 0XXX3XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H CAMDEN OH
2020-02-07 326-444 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H ENON OH
2020-02-07 326-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MARSHALL OH
2020-02-07 326-666 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H TREMONT CY OH
2020-02-07 326-777 0XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GEORGETOWN OH
2020-02-07 326-999 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WESTMILTON OH
2020-02-07 786-745 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 KEYS FL
2020-02-07 873-670 not yet reported which blocks → Videotron Ltd. 8306 Amos —
2020-02-07 878-778 2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E BLACKTOWN PA
2020-02-07 878-788 2XXX3XXX4XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E FOXBURG PA
2020-02-07 878-789 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E PETROLIA PA
2020-02-07 904-577 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JACKSONVL FL
2020-02-06 202-952 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-02-06 309-560 0XXX1XXX3XXX5XXX6XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 COLFAX IL
2020-02-06 680-212 0XXX1XXX2XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E MACOMB NY
2020-02-06 779-268 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ST ANNE IL
2020-02-06 782-222 not yet reported which blocks → Iristel Inc. 154E Truro —
2020-02-05 208-296 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BOISE ID
2020-02-05 213-414 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2020-02-05 252-254 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E ELIZABTHCY NC
2020-02-05 267-862 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHLDLPHZN2 PA
2020-02-05 267-957 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHLDLPHZN4 PA
2020-02-05 332-226 0–9 XXXwhole prefix which blocks → LTE WIRELESS INC D/B/A LTE WIRELESS - NY 452J NWYRCYZN01 NY
2020-02-05 343-698 not yet reported which blocks → Bell Canada 8051 Manotick —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.