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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 216-806 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-810 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 MONTRSE OH
— 216-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 216-812 7XXX which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
— 216-813 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-817 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-818 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-819 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-820 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
— 216-822 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-823 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MONTRSE OH
— 216-825 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TERRACE OH
— 216-828 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-830 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-831 not yet reported which blocks → OHIO BELL TEL CO 9321 TERRACE OH
— 216-832 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
— 216-834 1XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 INDEPNDNCE OH
— 216-838 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
— 216-839 0XXX9XXX which blocks → OHIO BELL TEL CO 9321 TERRACE OH
— 216-844 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-849 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
— 216-850 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-851 6XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-855 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-857 8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
— 216-858 0XXX6XXX7XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-861 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-862 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND OH
— 216-865 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONTRSE OH
— 216-867 2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
— 216-868 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C INDEPNDNCE OH
— 216-870 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-875 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-880 not yet reported which blocks → SPOK, INC. 6630 TERRACE OH
— 216-881 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-883 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-885 not yet reported which blocks → OH
— 216-889 3XXX7XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-890 not yet reported which blocks → SPOK, INC. 6630 CLEVELAND OH
— 216-894 1XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-896 not yet reported which blocks → OHIO BELL TEL CO 9321 TERRACE OH
— 216-898 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-901 not yet reported which blocks → OHIO BELL TEL CO 9321 INDEPNDNCE OH
— 216-902 1XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 216-903 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-904 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-905 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-906 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
— 216-910 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TERRACE OH
— 216-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX 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.