NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 916-560

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

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

The ten 1,000-number thousand-blocks inside prefix 916-560 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 916 blocks

Most active assignees, all time — NPA 916
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 3
COMCAST PHONE OF CALIFORNIA, LLC 3
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 1
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 1
LEVEL 3 COMMUNICATIONS, LLC - CA 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
— 916-560-0XXX 0000–0999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL CTHT CA
2012-02-15 916-560-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2011-11-16 916-560-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 RSVL CTHT CA
2009-03-03 916-560-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2012-06-15 916-560-4XXX 4000–4999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL CTHT CA
2005-05-12 916-560-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-05-12 916-560-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-05-12 916-560-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2006-07-19 916-560-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2006-07-19 916-560-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.