NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-11-02 825-997 not yet reported which blocks → TELUS Mobility 8301 Hardisty —
2016-11-02 825-998 not yet reported which blocks → TELUS Mobility 8301 Oyen —
2016-11-02 909-442 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RIALTO CA
2016-11-02 954-955 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FTLAUDERDL FL
2016-11-01 385-515 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2016-11-01 424-541 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C INGLEWOOD CA
2016-11-01 470-358 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2016-11-01 843-827 0XXX which blocks → SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC 527H AYNOR SC
2016-11-01 870-907 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MAMMOTHSPG AR
2016-11-01 870-971 0XXX1XXX2XXX3XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SALEM AR
2016-11-01 979-317 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KURTEN TX
2016-10-31 224-414 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BENSENVL IL
2016-10-31 314-519 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2016-10-31 385-434 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2016-10-31 417-371 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J SPRINGFLD MO
2016-10-31 431-721 not yet reported which blocks → TELUS Integrated Communications 2782 Dauphin —
2016-10-31 431-722 not yet reported which blocks → TELUS Integrated Communications 2782 Melita —
2016-10-31 431-723 not yet reported which blocks → TELUS Integrated Communications 2782 Morris —
2016-10-31 431-724 not yet reported which blocks → TELUS Integrated Communications 2782 Swan River —
2016-10-31 431-725 not yet reported which blocks → TELUS Integrated Communications 2782 Thompson —
2016-10-31 469-929 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PLANO TX
2016-10-31 480-508 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2016-10-28 267-832 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTOWN PA
2016-10-28 270-648 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PANTHER KY
2016-10-28 309-513 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 1183 ALEDO IL
2016-10-28 440-870 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C STRONGSVL OH
2016-10-28 442-296 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E CROWLEY LK CA
2016-10-28 442-298 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E TRONA CA
2016-10-28 470-359 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
2016-10-28 628-257 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E MILLVALLEY CA
2016-10-28 650-865 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2016-10-28 873-482 not yet reported which blocks → ISP Telecom Inc. 4727 La Minerve —
2016-10-28 873-483 not yet reported which blocks → ISP Telecom Inc. 4727 L'Annonciation —
2016-10-27 217-616 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - IL 1015 AUBURN IL
2016-10-27 217-780 0XXX1XXX7XXX9XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 CASEY IL
2016-10-27 520-354 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2016-10-27 571-767 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-27 581-501 not yet reported which blocks → Iristel Inc. 154E Levis —
2016-10-27 619-695 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
2016-10-27 639-227 not yet reported which blocks → Bell Mobility 6574 Birch Hills —
2016-10-27 639-228 not yet reported which blocks → Bell Mobility 6574 Kinistino —
2016-10-27 639-229 not yet reported which blocks → Bell Mobility 6574 Naicam —
2016-10-27 639-230 not yet reported which blocks → Bell Mobility 6574 Canwood —
2016-10-27 639-231 not yet reported which blocks → Bell Mobility 6574 Porcupine Plain —
2016-10-27 639-232 not yet reported which blocks → Bell Mobility 6574 Leask —
2016-10-27 639-233 not yet reported which blocks → Bell Mobility 6574 Smeaton —
2016-10-27 639-234 not yet reported which blocks → Bell Mobility 6574 Goodsoil —
2016-10-27 639-235 not yet reported which blocks → Bell Mobility 6574 Kyle —
2016-10-27 639-251 not yet reported which blocks → Bell Mobility 6574 Elrose —
2016-10-27 737-248 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 KYLE TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.