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
2012-09-20 413-345-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2012-09-20 413-388-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2012-09-18 413-234-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-09-18 413-234-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-09-18 413-273-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-09-18 413-355-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-09-18 413-355-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-09-05 413-372-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J SPRINGFLD MA
2012-08-23 413-362-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2012-08-20 413-523-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2012-08-20 413-523-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2012-08-14 413-422-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J MILLERSFLS MA
2012-08-01 413-588-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHAMPTN MA
2012-07-27 413-685-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUNTINGTON MA
2012-07-26 413-893-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MONSON MA
2012-07-02 413-240-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHICOPEE MA
2012-06-29 413-318-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ELONGMEDOW MA
2012-06-26 413-203-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K EASTHAMPTN MA
2012-06-15 413-388-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2012-06-15 413-961-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WORTHINGTN MA
2012-06-14 413-216-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BECKET MA
2012-06-12 413-307-9XXX 9000–9999Assigned AT&T - LOCAL 7421 ADAMS MA
2012-06-01 413-345-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 AMHERST MA
2012-06-01 413-366-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 WILBRAHAM MA
2012-06-01 413-486-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 ELONGMEDOW MA
2012-06-01 413-676-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 TURNERSFLS MA
2012-06-01 413-754-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 LONGMEADOW MA
2012-06-01 413-779-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 EASTHAMPTN MA
2012-05-25 413-225-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NORTHFIELD MA
2012-05-24 413-279-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WILBRAHAM MA
2012-05-22 413-209-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2012-05-22 413-276-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2012-05-22 413-284-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2012-05-22 413-387-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHAMPTN MA
2012-05-07 413-831-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SOUTHWICK MA
2012-04-30 413-893-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 MONSON MA
2012-04-24 413-338-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WARREN MA
2012-04-19 413-277-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WARE MA
2012-04-18 413-642-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WESTFIELD MA
2012-04-12 413-234-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SPRINGFLD MA
2012-04-06 413-276-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-04-06 413-276-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-04-06 413-276-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-04-05 413-384-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LONGMEADOW MA
2012-03-28 413-655-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HINSDALE MA
2012-03-16 413-276-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2012-03-13 413-477-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J GILBERTVL MA
2012-03-13 413-588-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORTHAMPTN MA
2012-03-07 413-752-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIMFIELD MA
2012-03-05 413-306-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD 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.