NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2011-02-10 415-852 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-02-10 423-800 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHATTNOOGA TN
2011-02-10 615-900 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MURFREESBO TN
2011-02-10 778-521 not yet reported which blocks → Shaw Telecom Inc. 497E Elkford —
2011-02-10 847-503 0–9 XXXall 10 · 3 holders which blocks → ILLINOIS BELL TEL CO 9329 GLENVIEW IL
2011-02-09 203-519 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WATERBURY CT
2011-02-09 229-354 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 LEARY GA
2011-02-09 434-623 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F LAWRENCEVL VA
2011-02-09 435-299 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PRICE UT
2011-02-09 513-900 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LTL MIAMI OH
2011-02-09 520-314 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2011-02-09 540-492 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
2011-02-09 571-429 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2011-02-09 671-971 not yet reported which blocks → PTI PACIFICA INC. 387C AGANA GU
2011-02-09 708-400 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2011-02-09 757-690 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2011-02-09 757-909 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF THE MID-ATLANTIC, LLC - VA 168G NRFOLKZON6 VA
2011-02-09 762-354 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C APPLING GA
2011-02-09 912-642 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C JOHNSONCOR GA
2011-02-09 919-797 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K DURHAM NC
2011-02-08 571-477 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 OCCOQUAN VA
2011-02-08 614-900 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2011-02-08 720-437 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2011-02-08 774-400 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2011-02-08 803-291 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SRNGFLSLLY SC
2011-02-08 804-554 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F RICHMOND VA
2011-02-08 843-604 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BLENHEIM SC
2011-02-08 864-362 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C JOANNA SC
2011-02-08 919-825 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 RALEIGH NC
2011-02-07 225-452 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MORGANZA LA
2011-02-07 251-274 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MCINTOSH AL
2011-02-07 276-258 0–9 XXXall 10 · 6 holders which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 ABINGDON VA
2011-02-07 289-442 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2011-02-07 289-930 not yet reported which blocks → TELUS Mobility 8303 Milton —
2011-02-07 289-935 not yet reported which blocks → TELUS Mobility 8303 Georgetown —
2011-02-07 315-741 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
2011-02-07 334-645 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C MAPLESVL AL
2011-02-07 337-573 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C YOUNGSVL LA
2011-02-07 636-775 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TROY MO
2011-02-07 709-323 not yet reported which blocks → Bell Mobility Aliant 329A Harbour Breton —
2011-02-07 709-324 not yet reported which blocks → Bell Mobility Aliant 329A St. Alban's —
2011-02-07 715-994 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KESHENA WI
2011-02-04 202-999 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-02-04 417-812 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2011-02-04 443-990 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2011-02-04 661-402 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2011-02-04 662-642 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MICHIGANCY MS
2011-02-04 779-235 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CRESCENTCY IL
2011-02-03 571-535 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2011-02-03 928-815 4XXX which blocks → NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 4449 WINDOWROCK AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.