NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
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
2010-01-29 403-812 not yet reported which blocks → Distributel 081E Canmore —
2010-01-29 403-910 not yet reported which blocks → Distributel 081E Calgary —
2010-01-29 780-809 not yet reported which blocks → Distributel 081E Edmonton —
2010-01-28 210-466 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2010-01-28 305-834 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 KEYS FL
2010-01-28 306-430 not yet reported which blocks → SaskTel Mobility 9868 Kindersley —
2010-01-28 306-471 not yet reported which blocks → SaskTel Mobility 9868 Estevan —
2010-01-28 403-856 not yet reported which blocks → Shaw Telecom Inc. 497E Drumheller —
2010-01-28 403-871 not yet reported which blocks → Shaw Telecom Inc. 497E Rocky Mountain House —
2010-01-28 604-384 not yet reported which blocks → Shaw Telecom Inc. 497E Pemberton —
2010-01-28 705-896 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Barrie —
2010-01-28 812-531 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRAZIL IN
2010-01-28 819-931 not yet reported which blocks → Videotron Ltd. 8306 Ottawa-Hull —
2010-01-28 912-850 2XXX3XXX4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 DOUGLAS GA
2010-01-27 229-361 1XXX which blocks → MCC TELEPHONY LLC 593K OMEGA GA
2010-01-27 229-521 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY LLC 593K VIENNA GA
2010-01-27 479-261 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
2010-01-27 484-772 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
2010-01-27 631-318 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AMAGANSETT NY
2010-01-27 912-683 0XXX1XXX7XXX · 3 holders which blocks → MCC TELEPHONY LLC 593K WILLACOCHE GA
2010-01-26 229-492 1XXX which blocks → MCC TELEPHONY LLC 593K LENOX GA
2010-01-26 229-814 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY LLC 593K LEESBURG GA
2010-01-26 325-256 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SWEETWATER TX
2010-01-26 513-402 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J MONROE OH
2010-01-26 601-909 0–9 XXXall 10 · 6 holders which blocks → TELEPAK NETWORKS, INC. - MS 5278 HATTIESBG MS
2010-01-26 651-447 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2010-01-26 719-363 not yet reported which blocks → SECOM, INC. - CO 768C LA JUNTA CO
2010-01-26 806-431 not yet reported which blocks → VEXUS 4913 CANYON TX
2010-01-26 806-521 not yet reported which blocks → TELNYX LLC 073H BORGER TX
2010-01-26 912-533 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY LLC 593K PEARSON GA
2010-01-26 940-434 0XXX1XXX2XXX4XXX · 2 holders which blocks → ONVOY, LLC - TX 903C BURKBURNTT TX
2010-01-25 217-579 0–9 XXXall 10 · 8 holders which blocks → MCC TELEPHONY LLC 593K PAXTON IL
2010-01-25 217-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → MCC TELEPHONY LLC 593K TUSCOLA IL
2010-01-25 217-681 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → MCC TELEPHONY LLC 593K VILLAGROVE IL
2010-01-25 567-331 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C PERRYSBURG OH
2010-01-25 682-239 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WEATHERFD TX
2010-01-25 682-333 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WEATHERFD TX
2010-01-22 209-647 0–9 XXXall 10 · 8 holders which blocks → WIDE VOICE, LLC - CA 252F MANTECA CA
2010-01-22 620-322 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C ANTHONY KS
2010-01-22 734-315 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C NEW BOSTON MI
2010-01-22 778-520 not yet reported which blocks → Shaw Telecom Inc. 497E Cranbrook —
2010-01-22 805-360 0XXX1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → WIDE VOICE, LLC - CA 252F LOS ALAMOS CA
2010-01-21 480-779 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2010-01-21 570-583 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 PORTLAND PA
2010-01-21 916-896 0–9 XXXall 10 · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 3964 ELK GROVE CA
2010-01-20 210-441 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2010-01-20 214-790 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2010-01-20 403-751 not yet reported which blocks → Shaw Telecom Inc. 497E Cowley —
2010-01-20 409-238 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ORANGE TX
2010-01-20 575-323 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → VALUTEL COMMUNICATIONS, INC. - NM 9658 LAS CRUCES NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.