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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-09-21 413-854-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GREATBNGTN MA
2011-09-14 413-377-6XXX 6000–6999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F CHICOPEE MA
2011-09-14 413-420-8XXX 8000–8999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F HOLYOKE MA
2011-09-12 413-727-4XXX 4000–4999Assigned METROPCS, INC. 5562 NORTHAMPTN MA
2011-08-29 413-391-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2011-08-25 413-255-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GRANBY MA
2011-08-10 413-505-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-08-10 413-505-4XXX 4000–4999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-08-10 413-505-6XXX 6000–6999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-08-10 413-505-7XXX 7000–7999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-08-10 413-505-8XXX 8000–8999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-08-08 413-749-8XXX 8000–8999Assigned RINGSQUARED TELECOM LLC 311D ADAMS MA
2011-08-03 413-642-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WESTFIELD MA
2011-07-26 413-923-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHAMPTN MA
2011-07-15 413-961-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WORTHINGTN MA
2011-07-12 413-331-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2011-07-11 413-324-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2011-07-11 413-355-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2011-06-28 413-961-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WORTHINGTN MA
2011-06-16 413-240-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2011-06-13 413-394-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J LEE MA
2011-06-13 413-394-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J LEE MA
2011-06-13 413-799-6XXX 6000–6999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F SPRINGFLD MA
2011-06-08 413-362-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2011-06-08 413-362-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2011-05-31 413-206-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHICOPEE MA
2011-05-31 413-248-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SHEFFIELD MA
2011-05-31 413-273-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SPRINGFLD MA
2011-05-31 413-300-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DALTON MA
2011-05-31 413-341-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NORTHAMPTN MA
2011-05-31 413-344-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E PITTSFIELD MA
2011-05-31 413-345-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMHERST MA
2011-05-31 413-345-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2011-05-31 413-422-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILLERSFLS MA
2011-05-31 413-579-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WESTFIELD MA
2011-05-26 413-207-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUNTINGTON MA
2011-05-26 413-224-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELONGMEDOW MA
2011-05-26 413-331-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHICOPEE MA
2011-05-16 413-304-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2011-05-16 413-304-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2011-05-16 413-523-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2011-05-16 413-523-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2011-05-16 413-523-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2011-05-09 413-344-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2011-05-09 413-344-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2011-05-09 413-344-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2011-05-09 413-588-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHAMPTN MA
2011-05-09 413-650-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HOLYOKE MA
2011-05-09 413-693-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SPRINGFLD MA
2011-05-09 413-858-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E 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.