NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 458
COMCAST IP PHONE, LLC 17
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
2023-04-20 458-273-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2023-04-20 458-273-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2023-04-20 458-273-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2023-04-20 458-273-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2022-05-24 458-266-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LEBANON OR
2020-09-16 458-253-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ALBANY OR
2020-09-16 458-253-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ALBANY OR
2020-09-08 458-240-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2020-09-08 458-240-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2019-11-20 458-240-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2018-11-16 458-221-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2018-06-26 458-233-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ALBANY OR
2016-05-20 458-215-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2015-07-24 458-210-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2014-02-14 458-201-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2013-07-22 458-201-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR
2012-04-18 458-205-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EUGENE OR

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.