NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 234-285 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J AKRON OH
— 234-289 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MASSILLON OH
— 234-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-322 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
— 234-335 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J LISBON OH
— 234-339 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C GIRARD OH
— 234-344 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H HUDSON OH
— 234-364 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J CANTON OH
— 234-376 0–9 XXXall 10 · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K AKRON OH
— 234-397 0XXX1XXX2XXX9XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K NILES OH
— 234-407 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TELNYX LLC 073H NAVARRE OH
— 234-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-542 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
— 234-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST OH
— 234-601 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 WESTFLDCTR OH
— 234-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-700 not yet reported which blocks → OH
— 234-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-736 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELIVERPOOL OH
— 234-742 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J HOLMESVL OH
— 234-752 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MALVERN OH
— 234-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-855 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 234-863 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 AKRON OH
— 234-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 234-926 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J WARREN OH
— 234-950 not yet reported which blocks → OH
— 234-958 not yet reported which blocks → OH
— 234-959 not yet reported which blocks → OH
— 234-976 not yet reported which blocks → OH
— 235-211 not yet reported which blocks → MO
— 235-311 not yet reported which blocks → MO
— 235-411 not yet reported which blocks → MO
— 235-511 not yet reported which blocks → MO
— 235-555 not yet reported which blocks → MO
— 235-611 not yet reported which blocks → MO
— 235-700 not yet reported which blocks → MO
— 235-711 not yet reported which blocks → MO
— 235-811 not yet reported which blocks → MO
— 235-911 not yet reported which blocks → MO
— 235-950 not yet reported which blocks → MO
— 235-958 not yet reported which blocks → MO
— 235-959 not yet reported which blocks → MO
— 235-976 not yet reported which blocks → MO
— 239-205 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C CAPE CORAL FL
— 239-208 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C FORT MYERS FL
— 239-209 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT MYERS FL
— 239-210 1XXX5XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J FORT MYERS FL
— 239-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.