NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2022-01-25 269-863 3XXX5XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BURR OAK MI
2022-01-25 270-610 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 CADIZ KY
2022-01-25 302-591 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 GEORGETOWN DE
2022-01-25 313-669 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN5 MI
2022-01-25 346-546 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H LANGHAMCRK TX
2022-01-25 365-363 not yet reported which blocks → Iristel Inc. 154E Markham —
2022-01-25 365-376 not yet reported which blocks → Iristel Inc. 154E Markham —
2022-01-25 380-244 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WJEFFERSON OH
2022-01-25 385-454 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2022-01-25 385-459 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-01-25 409-894 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J BEAUMONT TX
2022-01-25 464-927 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CICERO IL
2022-01-25 475-467 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TRUMBULL CT
2022-01-25 475-639 0XXX1XXX2XXX3XXX4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J REDDING CT
2022-01-25 520-608 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E SAN MANUEL AZ
2022-01-25 567-487 0XXX1XXX2XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREEN SPG OH
2022-01-25 567-639 4XXX7XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RCFLDCTBRY OH
2022-01-25 573-618 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MO 093F MARBLEHILL MO
2022-01-25 581-410 not yet reported which blocks → Iristel Inc. 154E Sainte-Marie-de-Beauce —
2022-01-25 657-561 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ORANGE CA
2022-01-25 681-364 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F GREENVILLE WV
2022-01-25 681-423 0XXX1XXX2XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F WELLSBURG WV
2022-01-25 681-425 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F PETERSTOWN WV
2022-01-25 689-272 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KISSIMMEE FL
2022-01-25 709-606 not yet reported which blocks → Iristel Inc. 154E St. John's —
2022-01-25 830-390 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → COMMIO, LLC 939H SEGUIN TX
2022-01-25 930-258 0XXX1XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ROCKPORT IN
2022-01-25 930-259 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 DALE IN
2022-01-25 945-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H PLANO TX
2022-01-25 947-334 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BIRMINGHAM MI
2022-01-25 959-266 0XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAWCATUCK CT
2022-01-25 959-922 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J E HAMPTON CT
2022-01-25 959-995 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WILLIMNTIC CT
2022-01-25 984-687 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARY NC
2022-01-25 984-742 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAL DUR AP NC
2022-01-25 986-482 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J LOWMAN ID
2022-01-25 986-896 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J COERDALENE ID
2022-01-25 989-515 0XXX1XXX2XXX4XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ONAWAY MI
2022-01-24 213-651 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2022-01-24 225-477 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J BATONROUGE LA
2022-01-24 236-201 not yet reported which blocks → Iristel Inc. 154E Midway —
2022-01-24 236-462 not yet reported which blocks → Iristel Inc. 154E Nanaimo —
2022-01-24 239-380 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 NAPLES FL
2022-01-24 239-662 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO NAPLES FL
2022-01-24 239-663 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BONITA SPG FL
2022-01-24 239-746 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EVERGLADES FL
2022-01-24 301-597 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2022-01-24 326-227 2XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FLTCHELENA OH
2022-01-24 365-744 not yet reported which blocks → Iristel Inc. 154E Milton —
2022-01-24 438-908 not yet reported which blocks → Iristel Inc. 154E Montreal —

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.