NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 562-977

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 562-977 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 562 blocks

Most active assignees, all time — NPA 562
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 4
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
BANDWIDTH.COM CLEC, LLC - CA 2
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
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
— 562-977-0XXX 0000–0999Available NORWALK CA
— 562-977-1XXX 1000–1999Reserved U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
— 562-977-2XXX 2000–2999Reserved U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
2011-09-13 562-977-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NORWALK CA
— 562-977-4XXX 4000–4999Reserved U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
2008-07-09 562-977-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NORWALK CA
— 562-977-6XXX 6000–6999Reserved U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
2011-08-05 562-977-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NORWALK CA
2012-03-21 562-977-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NORWALK CA
2013-09-09 562-977-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NORWALK CA

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.