NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-02-01 567-370 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MANSFIELD OH
2022-02-01 581-465 not yet reported which blocks → Iristel Inc. 154E Matane —
2022-02-01 618-818 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALTON IL
2022-02-01 618-819 0XXX1XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BATCHTOWN IL
2022-02-01 618-820 0XXX1XXX8XXX which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BUNKERHILL IL
2022-02-01 636-289 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E HAWK POINT MO
2022-02-01 651-837 4XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCANDIMRIN MN
2022-02-01 662-964 0XXX1XXX2XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BALDWYN MS
2022-02-01 743-542 0XXX1XXX6XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ADVANCE NC
2022-02-01 762-425 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRASELTON GA
2022-02-01 762-554 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J LYERLY GA
2022-02-01 769-282 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VICKSBURG MS
2022-02-01 774-748 6XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MEDFIELD MA
2022-02-01 775-639 4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OWYHEE NV
2022-02-01 779-895 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ROCKFORD IL
2022-02-01 807-695 not yet reported which blocks → Iristel Inc. 154E Thunder Bay —
2022-02-01 839-227 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLAR SC
2022-02-01 839-639 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELLOREE SC
2022-02-01 848-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTPLEASANT NJ
2022-02-01 859-880 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H LEXINGTON KY
2022-02-01 862-753 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CALDWELL NJ
2022-02-01 865-562 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KNOXVILLE TN
2022-02-01 865-863 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SHARPSCHPL TN
2022-02-01 872-463 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHICGOZN10 IL
2022-02-01 901-631 0–9 XXXwhole prefix which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2022-02-01 901-663 0–9 XXXwhole prefix which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2022-02-01 912-624 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BRUNSWICK GA
2022-02-01 928-665 5XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANDCNYON AZ
2022-02-01 930-260 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J EVANSVILLE IN
2022-02-01 937-942 2XXX4XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C HIGGINSPT OH
2022-02-01 945-667 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ROCKWALL TX
2022-02-01 945-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRISCO TX
2022-02-01 956-670 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J EDINBURG TX
2022-02-01 986-334 2XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MAY ID
2022-01-31 205-866 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H DORA AL
2022-01-31 223-282 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 NEWBLOMFLD PA
2022-01-31 224-453 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEERFIELD IL
2022-01-31 276-334 0XXX1XXX2XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLINTWOOD VA
2022-01-31 276-537 0XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JONESVILLE VA
2022-01-31 276-843 7XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DANTE VA
2022-01-31 320-458 0XXX1XXX2XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E BIRDISLAND MN
2022-01-31 337-832 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J STMARTINVL LA
2022-01-31 339-273 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MARSHFIELD MA
2022-01-31 339-737 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HANOVER MA
2022-01-31 401-587 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCITUATE RI
2022-01-31 435-341 0XXX1XXX4XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F MONROE UT
2022-01-31 507-813 0XXX1XXX2XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E NEW SWEDEN MN
2022-01-31 507-814 0XXX6XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E CHATFIELD MN
2022-01-31 548-412 not yet reported which blocks → Fibernetics Corporation 464D Alvinston —
2022-01-31 548-413 not yet reported which blocks → Fibernetics Corporation 464D Brigden —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.