NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 234
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 53
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2023-10-31 234-837-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2023-08-11 234-259-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2021-04-27 234-293-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2018-12-03 234-259-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2018-06-14 234-803-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 BRUNSWICK OH
2016-02-09 234-212-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2015-05-20 234-714-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2015-03-18 234-931-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CANALFULTN OH
2014-12-18 234-742-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 HOLMESVL OH
2014-01-09 234-262-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2014-01-09 234-262-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2014-01-09 234-262-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2014-01-09 234-262-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2014-01-09 234-262-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2014-01-09 234-262-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
2013-12-02 234-701-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 SUGARCREEK OH
2013-09-12 234-221-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NAVARRE OH
2013-08-07 234-284-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 HUDSON OH
2013-03-04 234-208-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-11-19 234-231-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-11-19 234-231-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-11-19 234-231-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-11-19 234-231-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-10-31 234-203-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CANTON OH
2012-05-25 234-208-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-05-25 234-208-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2011-03-28 234-400-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 RICHFIELD OH
2010-12-28 234-200-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-206-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-206-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-206-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-206-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2010-10-08 234-352-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2008-02-27 234-678-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2008-02-27 234-678-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2006-11-13 234-466-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MONTROSE OH
2005-12-16 234-380-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 HUDSON OH
2005-07-26 234-466-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MONTROSE OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.