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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-10-02 986-388 2XXX3XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H HAMER ID
2020-10-02 986-422 2XXX4XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H COUNCIL ID
2020-10-02 986-455 2XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H CHALLIS ID
2020-10-02 986-465 8XXX which blocks → FRACTEL, LLC 965H ALPINE ID
2020-10-02 986-588 5XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H ALBION ID
2020-10-02 986-732 3XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H ARCO ID
2020-10-02 986-755 5XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H ELK BEND ID
2020-10-02 986-842 5XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H ARBON ID
2020-10-02 986-899 8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H ELBA ID
2020-10-02 986-922 2XXX6XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ALMO ID
2020-10-02 986-977 0XXX1XXX2XXX3XXX7XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H BOISERIVER ID
2020-10-01 223-240 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J HARISBGZN1 PA
2020-10-01 223-255 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J GETTYSBURG PA
2020-10-01 228-274 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J GULFPORT MS
2020-10-01 236-847 not yet reported which blocks → Fibernetics Corporation 464D Pender Island —
2020-10-01 236-848 not yet reported which blocks → Fibernetics Corporation 464D Port Alice —
2020-10-01 236-849 not yet reported which blocks → Fibernetics Corporation 464D Port Hardy —
2020-10-01 240-741 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H FREDERICK MD
2020-10-01 262-267 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DELAVAN WI
2020-10-01 272-247 2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDLEBYCTR PA
2020-10-01 272-249 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J SCRANTON PA
2020-10-01 352-946 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CROSS CITY FL
2020-10-01 386-381 0XXX1XXX3XXX4XXX which blocks → ONVOY, LLC - FL 937C FLSHSBYRNH FL
2020-10-01 386-382 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - FL 937C LAKE CITY FL
2020-10-01 470-679 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
2020-10-01 479-398 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AR 348F HACKETT AR
2020-10-01 551-309 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J JERSEYCITY NJ
2020-10-01 573-973 1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MO 093F EOLIA MO
2020-10-01 601-440 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 478J CROSSROADS MS
2020-10-01 657-458 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2020-10-01 662-208 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J TUPELO MS
2020-10-01 689-689 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - FL 937C OVIEDO FL
2020-10-01 786-743 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C NORTH DADE FL
2020-10-01 806-906 3XXX which blocks → POKA LAMBRO TELEPHONE COMPANY 8661 BROWNFIELD TX
2020-10-01 813-705 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPACEN FL
2020-10-01 813-807 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J TAMPACEN FL
2020-10-01 814-606 0XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTFIELD PA
2020-10-01 814-610 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J ALTOONA PA
2020-10-01 850-945 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - FL 937C SHALIMAR FL
2020-10-01 878-278 2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E DARLINGTON PA
2020-10-01 904-604 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C FERNADNBCH FL
2020-09-30 218-593 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MOORHEAD MN
2020-09-30 224-363 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2020-09-30 234-286 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-30 236-844 not yet reported which blocks → Fibernetics Corporation 464D Cobble Hill —
2020-09-30 236-845 not yet reported which blocks → Fibernetics Corporation 464D Cortes Island —
2020-09-30 236-846 not yet reported which blocks → Fibernetics Corporation 464D Gold River —
2020-09-30 251-501 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J MOBILE AL
2020-09-30 309-835 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J PEORIA IL
2020-09-30 313-552 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J DETROITZN1 MI

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.