NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 937-553

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

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

The ten 1,000-number thousand-blocks inside prefix 937-553 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 937 blocks

Most active assignees, all time — NPA 937
BANDWIDTH.COM CLEC, LLC - OH 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 2
TWC IP ENABLED SERVICES, LLC 1
TELNYX LLC 1
TELEPORT COMMUNICATIONS AMERICA, 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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-12-16 937-553-0XXX 0000–0999Assigned TELNYX LLC 073H MARYSVILLE OH
2008-12-04 937-553-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F MARYSVILLE OH
2014-04-25 937-553-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F MARYSVILLE OH
2014-04-25 937-553-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F MARYSVILLE OH
2014-12-15 937-553-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARYSVILLE OH
2018-03-28 937-553-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARYSVILLE OH
2011-12-28 937-553-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 MARYSVILLE OH
2013-11-22 937-553-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARYSVILLE OH
2015-07-27 937-553-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARYSVILLE OH
2013-06-27 937-553-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K MARYSVILLE 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.