NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

14 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, last 30 days — NPA 413
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6
BANDWIDTH.COM CLEC, LLC - MA 5
NEW CINGULAR WIRELESS PCS, LLC - DC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
AHOI LLC 1
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
2018-08-30 413-266-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2018-08-30 413-266-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2018-08-10 413-287-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RUSSELL MA
2018-08-03 413-266-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2018-08-02 413-356-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2018-08-01 413-553-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PITTSFIELD MA
2018-07-26 413-327-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E LEE MA
2018-07-25 413-319-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
2018-07-09 413-291-2XXX 2000–2999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-07-09 413-291-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-07-09 413-291-4XXX 4000–4999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-07-09 413-291-5XXX 5000–5999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-06-26 413-360-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D SANDISFLD MA
2018-06-25 413-251-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HINSDALE MA
2018-06-21 413-225-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D NORTHFIELD MA
2018-06-21 413-267-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D MONSON MA
2018-06-21 413-323-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BELCHERTN MA
2018-06-21 413-356-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2018-06-21 413-366-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D WILBRAHAM MA
2018-06-21 413-402-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D SHEFFIELD MA
2018-06-21 413-529-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D EASTHAMPTN MA
2018-06-21 413-551-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D LENOX MA
2018-06-21 413-634-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D CUMMINGTON MA
2018-06-21 413-889-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D W STOCKBDG MA
2018-06-20 413-825-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D AMHRSTFKLN MA
2018-06-08 413-213-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELCHERTN MA
2018-04-25 413-238-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WORTHINGTN MA
2018-04-25 413-623-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BECKET MA
2018-04-25 413-853-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ASHFIELD MA
2018-04-17 413-252-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELCHERTN MA
2018-04-16 413-291-1XXX 1000–1999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-04-12 413-266-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2018-04-04 413-326-3XXX 3000–3999Assigned METROPCS, INC. 5562 NORTHAMPTN MA
2018-04-03 413-239-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NORTHFIELD MA
2018-03-29 413-324-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2018-03-16 413-417-1XXX 1000–1999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2018-03-16 413-769-4XXX 4000–4999Assigned METROPCS, INC. 5562 PITTSFIELD MA
2018-03-07 413-343-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D CHESTER MA
2018-03-05 413-571-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-03-05 413-571-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2018-02-20 413-296-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHESTERFLD MA
2018-02-08 413-937-4XXX 4000–4999Assigned TC SYSTEMS, INC. 7135 LEE MA

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.