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
2015-03-06 216-553 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CLEVELAND OH
2015-02-24 216-612 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2015-01-05 216-413 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
2014-12-24 216-512 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2014-11-17 216-358 0–9 XXXall 10 · 4 holders which blocks → OHIO BELL TEL CO 9321 TERRACE OH
2014-10-28 216-415 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CLEVELAND OH
2014-10-24 216-417 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-10-23 216-930 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2014-09-19 216-971 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-09-19 216-972 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-09-18 216-600 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CLEVELAND OH
2014-06-18 216-505 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C CLEVELAND OH
2014-06-17 216-309 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-17 216-507 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-05-02 216-352 0–9 XXXall 10 · 3 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2014-04-16 216-302 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND OH
2014-02-28 216-307 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 CLEVELAND OH
2014-02-18 216-804 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-02-18 216-860 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-11-11 216-703 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-29 216-801 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-27 216-808 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-07-09 216-303 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CLEVELAND OH
2013-05-22 216-331 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND OH
2012-11-27 216-301 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G CLEVELAND OH
2012-06-29 216-777 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CLEVELAND OH
2012-06-11 216-239 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2012-05-24 216-205 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND OH
2012-04-18 216-336 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
2012-03-12 216-209 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-11-28 216-203 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-20 216-927 0XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MONTRSE OH
2011-06-29 216-882 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-04-15 216-273 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C CLEVELAND OH
2010-12-02 216-442 0–9 XXXwhole prefix which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2010-12-01 216-285 0–9 XXXall 10 · 4 holders which blocks → OHIO BELL TEL CO 9321 TERRACE OH
2010-11-22 216-200 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND OH
2010-08-05 216-202 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2010-06-02 216-282 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CLEVELAND OH
2009-03-31 216-452 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
2008-01-23 216-785 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2007-07-17 216-848 0–9 XXXall 10 · 3 holders which blocks → SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 735E CLEVELAND OH
2007-07-09 216-482 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2007-01-10 216-759 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2005-12-29 216-448 0–9 XXXwhole prefix which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2005-11-23 216-816 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDEPNDNCE OH
2004-09-16 216-799 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2004-09-07 216-286 0–9 XXXwhole prefix which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2003-06-05 216-333 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND OH
2003-05-01 216-326 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CLEVELAND 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.