NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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 27
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
2011-02-17 779-300 0XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-02-17 779-400 0–9 XXXall 10 · 5 holders which blocks → YMAX COMMUNICATIONS CORP. - IL 259E DE KALB IL
2011-02-17 786-475 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MIAMI FL
2011-02-17 803-307 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATESBURG SC
2011-02-17 812-297 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D EVANSVILLE IN
2011-02-17 910-779 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FAYETTEVL NC
2011-02-17 912-439 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ST MARYS GA
2011-02-17 912-464 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ST MARYS GA
2011-02-17 919-322 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RALEIGH NC
2011-02-17 919-348 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E RALEIGH NC
2011-02-17 939-280 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-288 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-289 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-290 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-400 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-401 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-402 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-403 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-404 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-405 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-16 202-827 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2011-02-16 325-500 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → YMAX COMMUNICATIONS CORP. - TX 327E SAN ANGELO TX
2011-02-16 347-786 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2011-02-16 347-797 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN04 NY
2011-02-16 407-900 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C ORLANDO FL
2011-02-16 423-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TN 525E JOHNSON CY TN
2011-02-16 443-971 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F TANEYTOWN MD
2011-02-16 567-300 0XXX1XXX3XXX8XXX · 3 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - OH 047G HICKSVILLE OH
2011-02-16 904-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2011-02-16 973-816 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2011-02-16 979-307 0–9 XXXall 10 · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - TX 327E BRYAN TX
2011-02-16 985-200 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MADISONVL LA
2011-02-15 434-219 0–9 XXXall 10 · 5 holders which blocks → YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E LYNCHBURG VA
2011-02-15 480-499 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-15 540-638 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E HARRISONBG VA
2011-02-15 613-381 not yet reported which blocks → Westport Telephone Company Limited 920D Gananoque —
2011-02-15 613-431 not yet reported which blocks → NRTC Communications 940D Renfrew —
2011-02-15 705-979 not yet reported which blocks → Bragg Communications Inc. 4878 Buckhorn —
2011-02-15 757-915 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NWPTNWSZN2 VA
2011-02-15 786-899 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C MIAMI FL
2011-02-15 902-414 not yet reported which blocks → Bragg Communications Inc. 421G Halifax —
2011-02-15 951-309 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY OF THE WEST, LLC - CA 857F SUN CITY CA
2011-02-14 226-977 not yet reported which blocks → Fido Solutions Inc. 5643 London —
2011-02-14 252-316 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - NC 638E ROCKYMOUNT NC
2011-02-14 308-339 8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 GRAND IS NE
2011-02-14 321-345 0–9 XXXall 10 · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L MELBOURNE FL
2011-02-14 347-864 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2011-02-14 347-872 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-02-14 347-874 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2011-02-14 347-876 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.