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
2023-07-13 845-975 0XXX1XXX2XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H MILLBROOK NY
2023-07-13 845-979 0XXX7XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H PLEASATVLY NY
2023-07-13 845-982 0XXX1XXX2XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H RED HOOK NY
2023-07-13 845-983 0XXX1XXX8XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H RHINEBECK NY
2023-07-13 845-984 0–9 XXXall 10 · 4 holders which blocks → PEERING HUB, INC. - NY 818H SAUGERTIES NY
2023-07-13 870-915 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PAYNEWAY AR
2023-07-13 870-927 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WEINER AR
2023-07-13 872-224 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C CHICGOZN06 IL
2023-07-13 872-309 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN07 IL
2023-07-13 914-569 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C WSCHSTZN03 NY
2023-07-13 917-984 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2023-07-13 934-238 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C PATCHOGUE NY
2023-07-13 934-239 0XXX1XXX2XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC- NY 384C PTJEFFERSN NY
2023-07-13 934-240 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIVERHEAD NY
2023-07-13 940-346 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MINERLWLLS TX
2023-07-13 945-299 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C MIDLOTHIAN TX
2023-07-13 949-213 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2023-07-13 949-775 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2023-07-13 951-641 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HEMT HEMT CA
2023-07-12 219-339 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D HAMMOND IN
2023-07-12 256-209 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2023-07-12 308-290 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DANNEBROG NE
2023-07-12 437-787 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2023-07-12 475-334 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C STAMFORD CT
2023-07-12 509-791 0XXX1XXX · 2 holders which blocks → VOIP INNOVATIONS, LLC 597F GRANDVIEW WA
2023-07-12 539-294 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OK 409F PAWNEE OK
2023-07-12 572-221 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OK 409F BETHANY OK
2023-07-12 939-988 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2023-07-12 984-335 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 DURHAM NC
2023-07-11 224-497 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C ELGIN IL
2023-07-11 231-210 0XXX2XXX6XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ST JAMES MI
2023-07-11 231-418 0XXX2XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C MARION MI
2023-07-11 231-419 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C BELLAIRE MI
2023-07-11 231-426 2XXX which blocks → ONVOY, LLCV - MI 543C RAVENNA MI
2023-07-11 236-909 not yet reported which blocks → Fibernetics Corporation 464D Mission —
2023-07-11 254-490 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - TX 903C HUBBARD TX
2023-07-11 254-491 2XXX which blocks → ONVOY, LLC - TX 903C PRAIRIE HL TX
2023-07-11 254-497 2XXX3XXX · 2 holders which blocks → ONVOY, LLC - TX 903C RIESEL TX
2023-07-11 254-502 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C ROSENTHAL TX
2023-07-11 254-507 2XXX which blocks → ONVOY, LLC - TX 903C LOTT TX
2023-07-11 269-322 0XXX2XXX3XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C EDWARDSBG MI
2023-07-11 325-329 0XXX1XXX2XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C COMANCHE TX
2023-07-11 331-217 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C LOMBARD IL
2023-07-11 346-680 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HSTNSUBURB TX
2023-07-11 346-681 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SUGAR LAND TX
2023-07-11 367-891 not yet reported which blocks → Fibernetics Corporation 464D Loretteville —
2023-07-11 367-892 not yet reported which blocks → Fibernetics Corporation 464D Notre-Dame-des-Laurentides —
2023-07-11 367-893 not yet reported which blocks → Fibernetics Corporation 464D Ste-Catherine —
2023-07-11 367-966 not yet reported which blocks → Fibernetics Corporation 464D Charny —
2023-07-11 367-967 not yet reported which blocks → Fibernetics Corporation 464D Levis —

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.