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
2022-01-06 343-672 not yet reported which blocks → Fibernetics Corporation 464D Ingleside —
2022-01-06 343-673 not yet reported which blocks → Fibernetics Corporation 464D Iroquois —
2022-01-06 343-674 not yet reported which blocks → Fibernetics Corporation 464D L'Orignal —
2022-01-06 343-675 not yet reported which blocks → Fibernetics Corporation 464D Lancaster —
2022-01-06 346-538 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RICHMNRNBG TX
2022-01-06 346-539 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CYPRESS TX
2022-01-06 346-540 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SPLENDORA TX
2022-01-06 351-837 0XXX1XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ASHBY MA
2022-01-06 352-868 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SLRSPGSHRS FL
2022-01-06 463-676 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OAKLANDON IN
2022-01-06 629-935 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLDHICKORY TN
2022-01-06 659-678 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SPRINGVL AL
2022-01-06 682-532 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WEATHERFD TX
2022-01-06 769-280 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HATTIESBG MS
2022-01-06 769-373 0XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FAYETTE MS
2022-01-06 769-538 0XXX1XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CENTREVL MS
2022-01-06 771-717 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H WSHNGTNZN1 DC
2022-01-06 772-262 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 HOBE SOUND FL
2022-01-06 808-318 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI 6516 WAILUKU HI
2022-01-06 865-431 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SOLWAY TN
2022-01-06 954-508 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2022-01-05 223-746 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MIFFLINTN PA
2022-01-05 252-556 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SWANQUARTR NC
2022-01-05 252-612 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 6 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BELHAVEN NC
2022-01-05 272-424 2XXX4XXX5XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TOWANDA PA
2022-01-05 272-632 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PITTSTON PA
2022-01-05 272-633 1XXX2XXX3XXX4XXX6XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MUHLENBURG PA
2022-01-05 346-542 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2022-01-05 425-683 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EVERETT WA
2022-01-05 445-230 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2022-01-05 501-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F DAMASCUS AR
2022-01-05 502-659 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SIMPSONVL KY
2022-01-05 539-275 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OKEMAH OK
2022-01-05 539-278 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EUFAULA OK
2022-01-05 539-279 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F AVANT OK
2022-01-05 539-282 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
2022-01-05 539-357 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BARTLESVL OK
2022-01-05 825-945 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2022-01-05 947-241 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2022-01-05 986-942 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAYETTE ID
2022-01-04 220-219 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH
2022-01-04 223-279 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARISBGZN2 PA
2022-01-04 279-223 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2022-01-04 445-242 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2022-01-04 445-255 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2022-01-04 470-916 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CONCORD GA
2022-01-04 539-272 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OILTON OK
2022-01-04 563-307 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 DUBUQUE IA
2022-01-04 620-572 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E COPELAND KS
2022-01-04 620-573 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E ENGLEWOOD KS

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.