NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 — NPA 216
TELEPORT COMMUNICATIONS AMERICA, LLC - OH 1
ONVOY, LLC - OH 1
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
— 216-386 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-387 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-388 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-389 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-390 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-391 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-392 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND OH
— 216-393 2XXX3XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
— 216-394 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-395 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONTRSE OH
— 216-396 5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-397 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-398 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-399 5XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-400 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND OH
— 216-401 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-402 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-403 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-404 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-406 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-407 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-408 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-409 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-410 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 216-416 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CLEVELAND OH
— 216-419 not yet reported which blocks → OH
— 216-420 3XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-421 4XXX5XXX6XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-422 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CLEVELAND OH
— 216-423 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CLEVELAND OH
— 216-426 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-428 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
— 216-429 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-430 5XXX6XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CLEVELAND OH
— 216-431 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-432 8XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-433 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-436 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-437 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-438 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J MONTRSE OH
— 216-439 not yet reported which blocks → OH
— 216-440 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-441 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-443 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-444 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-445 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-446 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 INDEPNDNCE OH
— 216-447 not yet reported which blocks → OHIO BELL TEL CO 9321 INDEPNDNCE OH
— 216-450 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 TERRACE OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.