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 339
COMCAST IP PHONE, LLC 23
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
2023-04-04 339-231-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SAUGUS MA
2022-09-16 339-675-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WHITMAN MA
2021-08-18 339-231-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SAUGUS MA
2021-08-18 339-231-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SAUGUS MA
2021-08-17 339-365-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BRYANTVL MA
2021-08-17 339-365-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BRYANTVL MA
2021-08-04 339-226-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J REVERE MA
2021-08-04 339-226-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J REVERE MA
2017-10-13 339-217-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DUXBURY MA
2015-11-10 339-999-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WOBURN MA
2015-08-21 339-333-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LINCOLN MA
2014-12-01 339-214-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NORWELL MA
2014-09-24 339-205-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2014-09-12 339-777-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEEDHAM MA
2014-07-17 339-502-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CANTON MA
2013-07-09 339-201-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2012-07-12 339-201-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2011-12-02 339-933-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BRYANTVL MA
2011-11-28 339-502-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CANTON MA
2009-01-15 339-244-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRYANTVL MA
2007-06-14 339-788-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J ROCKLAND MA
2006-05-30 339-440-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LYNN MA
2006-05-30 339-440-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LYNN MA

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.