Thousands-blocks in 219-310

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 219-310 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 219 blocks

Most active assignees, all time — NPA 219

T-MOBILE USA, INC. 5

LEVEL 3 COMMUNICATIONS, LLC - IN 2

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 1

FIRST COMMUNICATIONS, LLC 1

COMCAST IP PHONE, 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2004-01-16	219-310-0XXX	0000–0999	Assigned	T-MOBILE USA, INC.	6529	CROWNPOINT	IN
—	219-310-1XXX	1000–1999	Reserved	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	CROWNPOINT	IN
2004-04-29	219-310-2XXX	2000–2999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN	7440	CROWNPOINT	IN
2004-10-11	219-310-3XXX	3000–3999	Assigned	FIRST COMMUNICATIONS, LLC	460K	CROWNPOINT	IN
—	219-310-4XXX	4000–4999	Reserved	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	CROWNPOINT	IN
2011-01-21	219-310-5XXX	5000–5999	Assigned	T-MOBILE USA, INC.	6529	CROWNPOINT	IN
2004-11-08	219-310-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	CROWNPOINT	IN
2006-01-10	219-310-7XXX	7000–7999	Assigned	T-MOBILE USA, INC.	6529	CROWNPOINT	IN
2005-04-15	219-310-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	CROWNPOINT	IN
2011-01-21	219-310-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	CROWNPOINT	IN

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.