NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-06-03 979-322 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 SOMERVILLE TX
2004-06-03 979-410 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 DEANVILLE TX
2004-06-03 979-515 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 SNOOKTUNIS TX
2004-06-03 979-556 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 LEXINGTON TX
2004-06-03 979-577 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 LA GRANGE TX
2004-06-02 205-359 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 WALNUT GRV AL
2004-06-02 205-363 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BLOUNTSVL AL
2004-06-02 217-501 0XXX1XXX2XXX4XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PETERSBURG IL
2004-06-02 217-516 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DANVILLE IL
2004-06-02 218-454 not yet reported which blocks → CONSOLIDATED TELEPHONE COMPANY - MN 925C BRAINERD MN
2004-06-02 234-421 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 GIRARD OH
2004-06-02 347-225 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN06 NY
2004-06-02 417-362 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MT VIEW MO
2004-06-02 507-226 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN 7783 ROCHESTER MN
2004-06-02 703-984 0–9 XXXall 10 · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
2004-06-02 860-562 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 ENFIELD CT
2004-06-02 870-490 4XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MOUNT IDA AR
2004-06-01 218-521 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CROOKSTON MN
2004-06-01 250-794 not yet reported which blocks → TELUS 8086 Fort St. John —
2004-06-01 256-743 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 GOODWATER AL
2004-06-01 308-392 3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GRAND IS NE
2004-06-01 334-377 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 HURTSBORO AL
2004-06-01 334-392 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FT DEPOSIT AL
2004-06-01 416-550 not yet reported which blocks → Bell Mobility 6574 Toronto —
2004-06-01 418-809 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2004-06-01 501-253 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLINTON AR
2004-06-01 703-296 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2004-06-01 703-776 0–9 XXXall 10 · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
2004-06-01 705-751 not yet reported which blocks → ExaTEL Inc. 3147 Parry Sound —
2004-06-01 785-314 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSBORNE KS
2004-06-01 787-595 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2004-06-01 819-679 not yet reported which blocks → Bell Mobility 6574 Sherbrooke —
2004-06-01 845-290 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K SPRING VLY NY
2004-06-01 870-504 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL AR
2004-06-01 940-210 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 DECATUR TX
2004-05-31 514-714 not yet reported which blocks → Bell Mobility 6574 Montreal —
2004-05-28 402-715 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OMAHA NE
2004-05-28 403-831 not yet reported which blocks → Bell Mobility 6574 Calgary —
2004-05-28 405-242 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F BRITTON OK
2004-05-28 508-779 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K UXBRIDGE MA
2004-05-28 646-307 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2004-05-28 734-232 0–9 XXXwhole prefix which blocks → MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2004-05-28 778-227 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2004-05-28 780-238 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2004-05-28 787-346 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2004-05-28 850-491 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TALLAHASSE FL
2004-05-27 229-234 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 GEORGETOWN GA
2004-05-27 410-200 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 EASTON MD
2004-05-27 514-264 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2004-05-27 514-265 not yet reported which blocks → TELUS Mobility 8303 Montreal —

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.