NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 308-856

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 308-856 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 308 blocks

Most active assignees, all time — NPA 308
ONVOY, LLC - NE 3
QWEST CORPORATION 2
ONVOY SPECTRUM, LLC 1
LEVEL 3 COMMUNICATIONS, LLC - NE 1
CHARTER IP ENABLED SERVICES, 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
— 308-856-0XXX 0000–0999Reserved QWEST CORPORATION 9631 ELM CREEK NE
2011-04-18 308-856-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELM CREEK NE
2021-03-04 308-856-2XXX 2000–2999Assigned ONVOY, LLC - NE 549E ELM CREEK NE
2019-11-25 308-856-3XXX 3000–3999Assigned ONVOY, LLC - NE 549E ELM CREEK NE
— 308-856-4XXX 4000–4999Reserved QWEST CORPORATION 9631 ELM CREEK NE
2019-08-27 308-856-5XXX 5000–5999Assigned ALLO COMMUNICATIONS LLC 907K ELM CREEK NE
2021-03-04 308-856-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E ELM CREEK NE
2025-01-03 308-856-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H ELM CREEK NE
2022-12-30 308-856-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 ELM CREEK NE
2021-05-05 308-856-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - NE 995E ELM CREEK NE

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.