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 401
COMCAST IP PHONE, LLC 166
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
2019-11-06 401-488-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WOONSOCKET RI
2019-10-14 401-320-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J W WARWICK RI
2019-09-20 401-949-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CENTREDALE RI
2019-07-16 401-537-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2019-07-09 401-515-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NARRAGNSTT RI
2019-06-05 401-324-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEWPORT RI
2018-12-20 401-205-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PAWTUCKET RI
2018-12-20 401-205-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PAWTUCKET RI
2018-07-09 401-563-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2018-07-09 401-563-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2018-05-29 401-537-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2018-04-24 401-563-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2018-04-20 401-563-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2017-11-13 401-251-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PORTSMOUTH RI
2017-11-13 401-252-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARREN RI
2017-11-13 401-268-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NO KINGSTN RI
2017-11-13 401-320-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J W WARWICK RI
2017-11-13 401-324-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEWPORT RI
2017-11-13 401-335-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PAWTUCKET RI
2017-11-13 401-384-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WARWICK RI
2017-11-13 401-387-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOPEVALLEY RI
2017-11-13 401-388-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WESTERLY RI
2017-11-13 401-407-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J COVENTRY RI
2017-11-13 401-409-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CAROLINA RI
2017-11-13 401-414-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2017-11-13 401-420-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LTLCOMPTON RI
2017-11-13 401-425-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CUMBLND HL RI
2017-11-13 401-471-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GREENWICH RI
2017-11-13 401-488-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WOONSOCKET RI
2017-11-13 401-515-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NARRAGNSTT RI
2017-11-13 401-560-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JAMESTOWN RI
2017-11-13 401-618-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CENTREDALE RI
2017-11-13 401-647-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SCITUATE RI
2017-11-13 401-710-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PASCOAG RI
2017-11-13 401-816-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TIVERTON RI
2017-11-13 401-968-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WGLOCESTER RI
2017-11-09 401-240-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BRISTOL RI
2017-10-16 401-618-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CENTREDALE RI
2017-08-04 401-721-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PAWTUCKET RI
2017-08-01 401-356-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WOONSOCKET RI
2017-07-13 401-619-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEWPORT RI
2017-06-02 401-308-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NARRAGNSTT RI
2017-04-24 401-342-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BRISTOL RI
2016-12-21 401-443-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PROVIDENCE RI
2016-10-24 401-921-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WARWICK RI
2016-05-19 401-298-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARWICK RI
2016-05-19 401-298-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WARWICK RI
2015-10-14 401-289-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WARREN RI
2015-06-30 401-560-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J JAMESTOWN RI
2015-06-10 401-889-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WARWICK RI

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.