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
2020-09-10 609-648 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN NJ
2020-09-10 660-599 5XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H LAREDO MO
2020-09-10 813-686 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPASTH FL
2020-09-10 813-706 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ZEPHYRHILS FL
2020-09-10 989-361 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NUSO, LLC 478J AUBURN MI
2020-09-09 249-207 not yet reported which blocks → Fibernetics Corporation 464D Lefroy —
2020-09-09 249-208 not yet reported which blocks → Fibernetics Corporation 464D Oro —
2020-09-09 343-638 not yet reported which blocks → Fibernetics Corporation 464D Frankford —
2020-09-09 343-639 not yet reported which blocks → Fibernetics Corporation 464D Marmora —
2020-09-09 343-640 not yet reported which blocks → Fibernetics Corporation 464D Plevna —
2020-09-09 343-641 not yet reported which blocks → Fibernetics Corporation 464D Stirling —
2020-09-09 343-642 not yet reported which blocks → Fibernetics Corporation 464D Tweed —
2020-09-09 365-536 not yet reported which blocks → Iristel Inc. 154E Unionville —
2020-09-09 506-560 not yet reported which blocks → Iristel Inc. 154E Sussex —
2020-09-09 539-247 7XXX which blocks → FRACTEL, LLC 965H SHIDLER OK
2020-09-09 539-346 2XXX which blocks → FRACTEL, LLC 965H DAVENPORT OK
2020-09-09 539-542 2XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H JENNINGS OK
2020-09-09 539-724 6XXX which blocks → FRACTEL, LLC 965H MANNFORD OK
2020-09-09 539-732 5XXX which blocks → FRACTEL, LLC 965H OCHELATA OK
2020-09-09 539-786 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H PRUE OK
2020-09-09 580-466 4XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H OKEENE OK
2020-09-09 580-577 5XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H CANTON OK
2020-09-09 580-899 0XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DILL CITY OK
2020-09-09 580-946 3XXX which blocks → FRACTEL, LLC 965H ROGERMILLS OK
2020-09-09 667-290 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J BALTIMORE MD
2020-09-09 667-292 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → IP HORIZON LLC 515J SALISBURY MD
2020-09-09 807-697 not yet reported which blocks → Iristel Inc. 154E Thunder Bay —
2020-09-09 872-272 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J CHICGOZN04 IL
2020-09-09 912-471 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESBORO GA
2020-09-09 912-491 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ODUM GA
2020-09-09 971-381 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D CLACKAMAS OR
2020-09-09 971-382 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D SALEM OR
2020-09-08 209-698 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MANTECA CA
2020-09-08 209-738 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANGELSCAMP CA
2020-09-08 209-739 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MANTECA CA
2020-09-08 209-746 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MERCED CA
2020-09-08 209-749 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MERCED CA
2020-09-08 209-750 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MODESTO CA
2020-09-08 209-771 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MODESTO CA
2020-09-08 213-491 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2020-09-08 234-282 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 KENT OH
2020-09-08 234-966 3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H JOHNSTON OH
2020-09-08 276-432 7XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H CLINCHPORT VA
2020-09-08 276-786 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CLINCHCO VA
2020-09-08 276-866 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H TAZEWELL VA
2020-09-08 276-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H POUND VA
2020-09-08 276-899 0XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H POCAHONTAS VA
2020-09-08 276-922 2XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H NICKELSVL VA
2020-09-08 276-933 0XXX3XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MOUTHWILSN VA
2020-09-08 276-955 0XXX1XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MARION VA

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.