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
2001-08-06 781-737 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CANTON MA
2001-07-27 781-484 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SAUGUS MA
2001-07-13 781-222 1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BURLINGTON MA
2001-05-30 781-315 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 READING MA
2001-05-30 781-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 MELROSE MA
2001-05-30 781-728 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 LINCOLN MA
2001-05-10 781-384 1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROCKLAND MA
2001-05-04 781-706 2XXX3XXX4XXX which blocks → METROPCS, INC. 5562 HINGHAM MA
2001-05-03 781-603 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → METROPCS, INC. 5562 NORWOOD MA
2001-05-03 781-727 2XXX3XXX4XXX8XXX which blocks → METROPCS, INC. 5562 NEEDHAM MA
2001-04-24 781-856 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWOOD MA
2001-04-24 781-929 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWOOD MA
2001-04-19 781-859 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J ARLINGTON MA
2001-04-11 781-995 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WOBURN MA
2001-03-19 781-475 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MEDFORD MA
2001-03-19 781-566 1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F MARSHFIELD MA
2001-03-19 781-905 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MALDEN MA
2001-02-23 781-223 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2001-02-23 781-236 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J COHASSET MA
2001-02-23 781-267 7XXX8XXX · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2001-02-23 781-300 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RANDOLPH MA
2001-02-23 781-362 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BURLINGTON MA
2001-02-23 781-363 4XXX5XXX7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CANTON MA
2001-02-23 781-413 1XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WEYMOUTH MA
2001-02-23 781-486 1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAKEFIELD MA
2001-02-23 781-514 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J NEEDHAM MA
2001-02-23 781-518 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MEDFORD MA
2001-02-23 781-626 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WEYMOUTH MA
2001-02-23 781-656 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J REVERE MA
2001-02-23 781-702 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORWOOD MA
2001-02-23 781-715 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LYNN MA
2001-02-23 781-720 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MELROSE MA
2001-02-23 781-909 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING MA
2001-02-23 781-914 3XXX4XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WAKEFIELD MA
2001-02-23 781-973 2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LYNNFIELD MA
2001-02-23 781-974 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WEYMOUTH MA
2001-02-23 781-975 2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 STOUGHTON MA
2001-02-23 781-992 1XXX2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 WELLESLEY MA
2001-02-22 781-504 0XXX2XXX7XXX · 3 holders which blocks → METROPCS, INC. 5562 WOBURN MA
2001-02-22 781-609 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J WALTHAM MA
2001-01-16 781-244 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J LYNN MA
2001-01-16 781-352 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORWOOD MA
2001-01-16 781-610 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J ROCKLAND MA
2001-01-16 781-801 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DEDHAM MA
2001-01-15 781-561 1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORWELL MA
2001-01-12 781-390 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 RANDOLPH MA
2001-01-12 781-919 1XXX4XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HINGHAM MA
2001-01-12 781-984 2XXX3XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 STONEHAM MA
2001-01-03 781-704 0XXX2XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 WOBURN MA
— 781-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 BURLINGTON 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.