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 973
COMCAST IP PHONE, LLC 41
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
2018-05-21 973-521-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CALDWELL NJ
2017-05-23 973-830-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CALDWELL NJ
2015-12-16 973-758-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LIVINGSTON NJ
2015-08-25 973-788-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MILLBURN NJ
2015-07-16 973-843-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SO ORANGE NJ
2015-07-07 973-486-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LIVINGSTON NJ
2015-03-04 973-969-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BELLEVILLE NJ
2014-09-30 973-982-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEWARK NJ
2013-01-23 973-232-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MILLBURN NJ
2012-10-18 973-893-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2011-11-08 973-521-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CALDWELL NJ
2011-09-02 973-369-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LIVINGSTON NJ
2010-11-10 973-707-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2010-05-04 973-826-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LITTLE FLS NJ
2007-10-25 973-441-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MORRISTOWN NJ
2007-10-25 973-507-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHATHAM NJ
2007-10-25 973-520-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MADISON NJ
2007-10-25 973-813-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MENDHAM NJ
2007-07-26 973-707-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2007-06-08 973-757-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEWARK NJ
2007-03-30 973-528-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVILLE NJ
2007-03-30 973-996-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SO ORANGE NJ
2007-02-16 973-218-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MILLBURN NJ
2007-02-15 973-707-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2006-09-13 973-337-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2006-09-13 973-351-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEWARK NJ
2006-09-01 973-302-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BELLEVILLE NJ
2006-07-03 973-337-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ
2006-07-03 973-900-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J NEWARK NJ
2006-04-24 973-849-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEWARK NJ
2006-03-30 973-766-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ORANGE NJ
2005-04-25 973-232-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MILLBURN NJ
2005-04-25 973-246-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PASSAIC NJ
2005-04-25 973-251-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LIVINGSTON NJ
2005-04-25 973-320-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NUTLEY NJ
2005-04-25 973-327-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SO ORANGE NJ
2005-04-25 973-419-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ORANGE NJ
2005-04-25 973-433-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J VERONA NJ
2005-04-22 973-287-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CALDWELL NJ
2005-04-22 973-302-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BELLEVILLE NJ
2004-08-13 973-337-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BLOOMFIELD NJ

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.