NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 916-436

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 916-436 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
LEVEL 3 COMMUNICATIONS, LLC - CA 5
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
ONVOY, LLC - CA 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
COMCAST PHONE OF CALIFORNIA, LLC 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
2024-07-03 916-436-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2004-12-15 916-436-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
— 916-436-2XXX 2000–2999Reserved U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FAIR OAKS CA
2011-12-22 916-436-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2009-04-29 916-436-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FAIR OAKS CA
2004-12-15 916-436-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2004-04-09 916-436-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2004-12-15 916-436-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2005-02-22 916-436-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2009-01-26 916-436-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS 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.