NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 317-318

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 317-318 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 317 blocks

Most active assignees, all time — NPA 317
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 3
COMCAST IP PHONE, LLC 2
BANDWIDTH.COM CLEC, LLC - IN 2
TELEPORT COMMUNICATIONS AMERICA, LLC - IN 1
LEVEL 3 TELECOM OF INDIANA, LP - IN 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
2011-01-28 317-318-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F GREENFIELD IN
2004-02-25 317-318-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD IN
2006-11-03 317-318-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C GREENFIELD IN
2011-09-13 317-318-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2011-07-29 317-318-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2006-10-09 317-318-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
— 317-318-6XXX 6000–6999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 GREENFIELD IN
2007-03-27 317-318-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 GREENFIELD IN
2011-03-10 317-318-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F GREENFIELD IN
2006-05-09 317-318-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD IN

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.