NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 574
COMCAST IP PHONE, LLC 71
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
2025-12-17 574-783-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LUCERNE IN
2025-12-17 574-944-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TWELVEMILE IN
2025-09-04 574-331-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BREMEN IN
2025-07-15 574-388-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LAPAZ IN
2025-07-01 574-586-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WALKERTON IN
2025-05-07 574-709-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LOGANSPORT IN
2023-08-30 574-354-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NAPPANEE IN
2023-04-12 574-688-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PIERCETON IN
2023-04-02 574-848-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BRISTOL IN
2022-09-28 574-390-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2022-09-28 574-390-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2022-09-28 574-390-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2022-06-16 574-663-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MIDDLEBURY IN
2020-05-28 574-330-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MILLERSBG IN
2019-12-10 574-931-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2017-10-30 574-338-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2017-10-10 574-999-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2016-08-19 574-931-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2016-08-02 574-322-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2016-05-04 574-218-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2015-11-16 574-404-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2015-07-10 574-971-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GOSHEN IN
2015-05-05 574-240-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MONTICELLO IN
2015-03-19 574-314-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2015-03-17 574-549-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WARSAW IN
2015-03-11 574-316-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PLYMOUTH IN
2015-02-05 574-891-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DUNLAP IN
2014-04-04 574-318-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2013-12-13 574-703-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2013-07-12 574-327-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2013-06-13 574-992-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LOGANSPORT IN
2013-05-03 574-327-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2012-09-28 574-651-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J OSCEOLA IN
2012-05-31 574-808-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MONTICELLO IN
2011-09-09 574-222-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2011-08-15 574-326-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2011-08-10 574-400-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2011-03-22 574-353-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MENTONE IN
2011-03-10 574-598-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AKRON IN
2011-02-24 574-943-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J IDAVILLE IN
2008-11-14 574-387-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2008-11-14 574-387-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2008-05-07 574-699-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GALVESTON IN
2007-11-20 574-855-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2007-11-09 574-343-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2007-10-16 574-376-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARSAW IN
2007-08-27 574-971-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GOSHEN IN
2007-03-08 574-847-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER IN
2006-11-15 574-992-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LOGANSPORT IN
2006-10-04 574-855-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND 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.