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
2020-06-09 365-850 not yet reported which blocks → Fibernetics Corporation 464D Clarkson —
2020-06-09 365-851 not yet reported which blocks → Fibernetics Corporation 464D Port Credit —
2020-06-09 365-853 not yet reported which blocks → Fibernetics Corporation 464D Burlington —
2020-06-09 561-497 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2020-06-09 629-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H PLEASANTVW TN
2020-06-09 727-338 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2020-06-09 731-900 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BIG SANDY TN
2020-06-09 786-833 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORTH DADE FL
2020-06-09 954-833 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FTLAUDERDL FL
2020-06-08 224-329 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROSELLE IL
2020-06-08 224-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WAUKEGAN IL
2020-06-08 226-541 not yet reported which blocks → Fibernetics Corporation 464D Guelph —
2020-06-08 226-547 not yet reported which blocks → Fibernetics Corporation 464D Woodstock —
2020-06-08 260-666 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H MONROEVL IN
2020-06-08 332-231 not yet reported which blocks → SHELCOMM 0051 NWYRCYZN01 NY
2020-06-08 432-285 0XXX4XXX · 2 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J MIDLAND TX
2020-06-08 469-839 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 DALLAS TX
2020-06-08 708-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FOREST IL
2020-06-08 872-265 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2020-06-08 907-207 1XXX2XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BETHEL AK
2020-06-08 915-268 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J EL PASO TX
2020-06-05 234-275 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J YOUNGSTOWN OH
2020-06-05 360-564 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E POULSBO WA
2020-06-05 364-203 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J BOWLNGGREN KY
2020-06-05 424-688 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LOMITA CA
2020-06-05 442-732 0XXX1XXX2XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H SANDY VLLY CA
2020-06-05 502-677 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J LOUISVILLE KY
2020-06-05 520-475 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J TUCSON AZ
2020-06-05 608-696 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPARTA WI
2020-06-05 618-575 0XXX1XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E SEFTON IL
2020-06-05 618-590 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E DIX IL
2020-06-05 618-595 0XXX1XXX5XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E SHIPMAN IL
2020-06-05 618-608 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E NEW MINDEN IL
2020-06-05 618-620 0XXX1XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C HAMBURG IL
2020-06-05 743-643 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J GREENSBORO NC
2020-06-05 825-532 not yet reported which blocks → Beanfield Technologies Inc. 575G Calgary —
2020-06-05 904-581 0–9 XXXall 10 · 3 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J JACKSONVL FL
2020-06-05 910-810 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J WILMINGTON NC
2020-06-05 984-884 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J RALEIGH NC
2020-06-04 210-866 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J SANANTONIO TX
2020-06-04 313-955 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 DETROITZN2 MI
2020-06-04 352-829 0–9 XXXall 10 · 4 holders which blocks → ORLANDO TELEPHONE COMPANY DBA SUMMIT BROADBAND 7857 LADY LAKE FL
2020-06-04 409-257 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J BEAUMONT TX
2020-06-04 479-388 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J FORT SMITH AR
2020-06-04 505-744 2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H RAMAH NM
2020-06-04 531-246 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUPERIOR NE
2020-06-04 581-945 not yet reported which blocks → TELUS Quebec 2243 Lambton —
2020-06-04 581-946 not yet reported which blocks → TELUS Quebec 2243 Courcelles —
2020-06-04 720-680 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LONGMONT CO
2020-06-04 850-886 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H YONGSTFNTN FL

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.