NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2012-11-13 505-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2012-11-13 636-445 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WENTZVILLE MO
2012-11-13 705-400 not yet reported which blocks → Fibernetics Corporation 464D Peterborough —
2012-11-13 705-409 not yet reported which blocks → Fibernetics Corporation 464D Campbellford —
2012-11-13 778-534 not yet reported which blocks → Shaw Telecom Inc. 497E Celista —
2012-11-13 814-892 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 SOUTH FORK PA
2012-11-12 412-660 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-11-12 515-800 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - IA 221F COLFAX IA
2012-11-12 581-422 not yet reported which blocks → Telecommunications Xittel Inc 247F Sainte-Agathe-de-Lotbiniere —
2012-11-12 581-423 not yet reported which blocks → Telecommunications Xittel Inc 247F Sainte-Henedine —
2012-11-12 581-424 not yet reported which blocks → Telecommunications Xittel Inc 247F Sainte-Marie-de-Beauce —
2012-11-12 581-425 not yet reported which blocks → Telecommunications Xittel Inc 247F Vallee-Jonction —
2012-11-12 581-426 not yet reported which blocks → Telecommunications Xittel Inc 247F Frampton —
2012-11-12 581-427 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Bernard-de-Dorchester —
2012-11-12 581-428 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Joseph-de-Beauce —
2012-11-12 581-429 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Patrice-de-Beaurivage —
2012-11-12 612-444 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2012-11-12 616-383 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SPARTA MI
2012-11-12 720-376 0–9 XXXall 10 · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2012-11-12 808-208 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI 6516 HONOLULU HI
2012-11-12 832-773 0–9 XXXall 10 · 3 holders which blocks → SOUTHWESTERN BELL 9533 CYPRESS TX
2012-11-12 904-516 0–9 XXXall 10 · 7 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 JACKSONVL FL
2012-11-12 919-205 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SMITHFIELD NC
2012-11-09 204-409 not yet reported which blocks → Provincial Tel Inc. 498E Winnipeg Beach —
2012-11-09 204-544 not yet reported which blocks → Provincial Tel Inc. 498E Niverville —
2012-11-09 204-640 not yet reported which blocks → Provincial Tel Inc. 498E St. Laurent —
2012-11-09 204-719 not yet reported which blocks → Provincial Tel Inc. 498E Eriksdale —
2012-11-09 204-860 not yet reported which blocks → Provincial Tel Inc. 498E Dugald —
2012-11-09 204-917 not yet reported which blocks → Provincial Tel Inc. 498E Roblin —
2012-11-09 251-301 0–9 XXXall 10 · 4 holders which blocks → TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2012-11-09 303-505 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2012-11-09 321-210 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2012-11-09 434-602 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 JARRATT VA
2012-11-09 561-402 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2012-11-09 587-712 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Edmonton —
2012-11-09 612-402 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2012-11-09 651-404 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK OF MINNESOTA, INC. 1456 HASTINGS MN
2012-11-09 757-785 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 NRFOLKZON2 VA
2012-11-09 803-620 0–9 XXXall 10 · 7 holders which blocks → PBT COMMUNICATIONS, INC. - SC 3453 YORK SC
2012-11-09 901-505 0–9 XXXall 10 · 5 holders which blocks → TELEPAK NETWORKS, INC. - TN 948G MEMPHIS TN
2012-11-08 480-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-11-08 574-401 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G SOUTH BEND IN
2012-11-08 603-213 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MILFORD NH
2012-11-08 719-999 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D COLORDOSPG CO
2012-11-08 720-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2012-11-08 774-361 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 OSTERVILLE MA
2012-11-08 774-404 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PLYMOUTH MA
2012-11-08 857-303 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-11-08 970-601 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D MEAD CO
2012-11-08 970-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D LOVELAND CO

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.