NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-09-25 469-896 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 CARROLLTON TX
2020-09-25 513-743 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J CINCINNATI OH
2020-09-25 657-455 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-09-25 708-621 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CICERO IL
2020-09-25 726-201 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SANANTONIO TX
2020-09-25 825-450 not yet reported which blocks → Iristel Inc. 154E Sherwood Park —
2020-09-25 825-451 not yet reported which blocks → Iristel Inc. 154E Sherwood Park —
2020-09-25 825-475 not yet reported which blocks → Iristel Inc. 154E Peace River —
2020-09-25 825-862 not yet reported which blocks → Iristel Inc. 154E Olds —
2020-09-24 209-619 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LOS BANOS CA
2020-09-24 210-935 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2020-09-24 213-549 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 07 CA
2020-09-24 249-294 not yet reported which blocks → Iristel Inc. 154E Borden-Angus —
2020-09-24 249-455 not yet reported which blocks → IXICA Communications Inc. 812H Penetanguishene —
2020-09-24 321-343 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MELBOURNE FL
2020-09-24 365-234 not yet reported which blocks → IXICA Communications Inc. 812H Bradford —
2020-09-24 438-230 not yet reported which blocks → Iristel Inc. 154E Ste-Genevieve —
2020-09-24 480-866 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-09-24 520-588 5XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H CASCABEL AZ
2020-09-24 520-644 4XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H KOMATKE AZ
2020-09-24 520-755 1XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H LONE BUTTE AZ
2020-09-24 520-899 8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H MARCOPAVLG AZ
2020-09-24 559-552 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FRESNO CA
2020-09-24 574-357 0XXX1XXX3XXX7XXX · 2 holders which blocks → NUSO, LLC 478J CULVER IN
2020-09-24 602-946 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-09-24 608-200 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BELOIT WI
2020-09-24 623-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-09-24 681-347 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 HNTNGTNZN1 WV
2020-09-24 737-279 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2020-09-24 802-341 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J BURLINGTON VT
2020-09-24 803-949 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 COLUMBIA SC
2020-09-24 807-696 not yet reported which blocks → Iristel Inc. 154E Thunder Bay —
2020-09-24 810-884 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 MARINECITY MI
2020-09-24 867-686 not yet reported which blocks → TELUS Mobility 8303 Yellowknife —
2020-09-24 928-465 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BULLHDCYN AZ
2020-09-24 970-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FT COLLINS CO
2020-09-23 224-526 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ARLIGTNHTS IL
2020-09-23 251-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H IRNGTNSTEL AL
2020-09-23 251-724 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MOBILE AL
2020-09-23 279-786 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCRM MAIN CA
2020-09-23 423-670 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J JOHNSON CY TN
2020-09-23 442-524 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J VTVL ADLN CA
2020-09-23 509-506 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-09-23 551-288 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C CLOSTER NJ
2020-09-23 562-560 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LONG BEACH CA
2020-09-23 609-244 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C PRINCETON NJ
2020-09-23 641-619 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → IMON COMMUNICATIONS, LLC - IA 695G PELLA IA
2020-09-23 657-650 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ORANGE CA
2020-09-23 657-757 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-09-23 657-895 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.