NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 781
VERIZON NEW ENGLAND INC. 232
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 92
PAETEC ITEL, LLC 69
LEVEL 3 COMMUNICATIONS, LLC - MA 59
TC SYSTEMS, INC. 57
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-03-13 781-988 0XXX1XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
2025-12-17 781-978 0XXX which blocks → VOIP INNOVATIONS, LLC 597F BRYANTVL MA
2025-03-04 781-781 0–9 XXXwhole prefix which blocks → MASS MOBILE LLC 125L LYNN MA
2024-12-18 781-991 0XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MEDFORD MA
2024-02-09 781-200 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H LYNN MA
2024-02-09 781-967 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H WEYMOUTH MA
2023-05-05 781-947 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
2023-05-03 781-946 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MEDFORD MA
2022-01-27 781-921 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MEDFORD MA
2021-12-03 781-692 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2021-12-03 781-809 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DEDHAM MA
2021-10-22 781-822 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WALTHAM MA
2021-09-24 781-868 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H WEYMOUTH MA
2021-09-23 781-889 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MARSHFIELD MA
2021-05-26 781-678 0–9 XXXall 10 · 4 holders which blocks → TC SYSTEMS, INC. 7135 HULL MA
2021-04-07 781-650 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WEYMOUTH MA
2021-02-12 781-612 0–9 XXXwhole prefix which blocks → TC SYSTEMS, INC. 7135 CANTON MA
2021-02-01 781-887 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D HANOVER MA
2020-06-16 781-745 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D NORWELL MA
2019-02-21 781-882 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D MARSHFIELD MA
2019-01-14 781-798 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 KINGSTON MA
2018-12-31 781-755 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALTHAM MA
2018-05-08 781-747 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2018-03-15 781-531 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2018-01-15 781-525 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2017-12-27 781-490 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORWELL MA
2017-12-20 781-445 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2017-12-13 781-403 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2017-12-11 781-468 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2017-12-08 781-379 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2017-10-10 781-855 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2017-08-24 781-299 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LYNN MA
2017-04-27 781-227 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALTHAM MA
2016-02-22 781-427 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D NORWELL MA
2016-01-04 781-732 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
2015-12-30 781-660 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WEYMOUTH MA
2015-08-24 781-980 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRAINTREE MA
2015-08-03 781-542 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J WEYMOUTH MA
2015-07-22 781-703 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALTHAM MA
2015-02-27 781-971 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2014-10-15 781-469 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
2014-09-12 781-600 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2014-05-23 781-877 0XXX1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2014-04-02 781-563 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRYANTVL MA
2014-03-03 781-800 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2013-11-03 781-207 3XXX4XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
2013-11-03 781-623 3XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LYNNFIELD MA
2013-11-03 781-634 3XXX4XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NORWOOD MA
2013-11-03 781-723 1XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MEDFORD MA
2013-11-03 781-823 1XXX7XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REVERE MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.