NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-01-14 920-742 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KAUKAUNA WI
2022-01-14 920-942 1XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KRAKOW WI
2022-01-14 925-537 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LIVERMORE CA
2022-01-14 928-872 1XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BULLHDCYN AZ
2022-01-14 936-374 0XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OAKHURST TX
2022-01-14 936-542 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J SEGNO TX
2022-01-14 936-548 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MONTGOMERY TX
2022-01-14 936-742 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GOODRICH TX
2022-01-14 936-746 1XXX4XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ONALASKA TX
2022-01-14 949-741 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2022-01-14 956-694 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BROWNSVL TX
2022-01-14 959-241 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ENFIELD CT
2022-01-14 959-269 0XXX1XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F NOTHOMPSON CT
2022-01-14 959-763 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DANIELSON CT
2022-01-14 959-788 5XXX7XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NOTHOMPSON CT
2022-01-14 986-221 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F WEISER ID
2022-01-13 224-536 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SKOKIE IL
2022-01-13 224-546 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PALATINE IL
2022-01-13 224-742 0XXX1XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HALF DAY IL
2022-01-13 225-546 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ROSEDALE LA
2022-01-13 225-566 0XXX5XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MARINGOUIN LA
2022-01-13 225-832 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEW ROADS LA
2022-01-13 225-837 0XXX1XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORGANZA LA
2022-01-13 234-646 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MANTUA OH
2022-01-13 234-663 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HOMERVILLE OH
2022-01-13 234-733 3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARROLLTON OH
2022-01-13 234-768 0XXX1XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MINERAL CY OH
2022-01-13 234-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SEBRING OH
2022-01-13 254-783 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J PROCTOR TX
2022-01-13 254-837 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J EVANT TX
2022-01-13 326-426 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MOWRYSTOWN OH
2022-01-13 331-866 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHEATON IL
2022-01-13 334-846 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PHENIXCITY AL
2022-01-13 339-466 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORWELL MA
2022-01-13 339-675 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITMAN MA
2022-01-13 343-583 not yet reported which blocks → Fibernetics Corporation 464D Enterprise —
2022-01-13 343-584 not yet reported which blocks → Fibernetics Corporation 464D Harrowsmith —
2022-01-13 343-586 not yet reported which blocks → Fibernetics Corporation 464D Inverary —
2022-01-13 343-587 not yet reported which blocks → Fibernetics Corporation 464D Newburgh —
2022-01-13 343-589 not yet reported which blocks → Fibernetics Corporation 464D Odessa —
2022-01-13 343-590 not yet reported which blocks → Fibernetics Corporation 464D Seeleys Bay —
2022-01-13 343-591 not yet reported which blocks → Fibernetics Corporation 464D Selby —
2022-01-13 343-592 not yet reported which blocks → Fibernetics Corporation 464D Tamworth —
2022-01-13 343-593 not yet reported which blocks → Fibernetics Corporation 464D Verona —
2022-01-13 343-595 not yet reported which blocks → Fibernetics Corporation 464D Yarker —
2022-01-13 385-481 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-01-13 413-472 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLYOKE MA
2022-01-13 423-832 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J CLINCHPORT TN
2022-01-13 445-235 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN39 PA
2022-01-13 447-783 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIDGE FARM IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.