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 503
COMCAST IP PHONE, LLC 135
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
2023-06-28 503-898-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J REDLAND OR
2023-06-28 503-996-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOUNTANGEL OR
2022-08-09 503-609-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CORBETT OR
2022-02-15 503-800-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J GERVAIS OR
2020-09-10 503-218-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2020-09-10 503-218-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2020-09-10 503-342-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2020-09-10 503-342-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2020-09-10 503-343-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2020-09-08 503-573-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRESHAM OR
2020-02-17 503-303-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2018-10-10 503-885-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2017-06-14 503-878-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2017-03-13 503-914-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2016-09-15 503-882-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2016-05-06 503-744-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2016-05-06 503-878-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2015-07-23 503-855-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2015-07-17 503-770-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHARBONNEU OR
2015-02-12 503-825-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SHERWOOD OR
2014-07-15 503-826-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2014-05-20 503-850-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2014-05-02 503-387-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2014-02-17 503-889-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2014-02-17 503-946-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2013-11-04 503-908-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2013-10-29 503-563-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2013-08-26 503-444-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2013-07-22 503-303-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2013-05-07 503-912-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GRESHAM OR
2012-12-14 503-305-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2012-09-10 503-305-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2012-07-02 503-908-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2012-06-21 503-521-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BEAVERTON OR
2011-09-01 503-328-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GRESHAM OR
2011-08-30 503-303-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2011-07-20 503-987-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SCAPPOOSE OR
2011-07-19 503-303-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2011-06-14 503-776-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J AURORA OR
2010-10-15 503-596-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BEAVERTON OR
2010-10-15 503-992-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BEAVERTON OR
2010-09-27 503-908-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2010-09-14 503-822-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SHERWOOD OR
2010-08-27 503-912-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRESHAM OR
2010-08-19 503-384-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2010-08-17 503-967-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SALEM OR
2010-05-27 503-410-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ST HELENS OR
2010-05-24 503-894-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2010-05-24 503-894-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J PORTLAND OR
2010-05-04 503-563-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR

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.