NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 401
ONVOY, LLC - RI 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 401-639 none assigned yet which blocks → METROPCS, INC. 5562 PROVIDENCE RI
— 401-640 none assigned yet which blocks → METROPCS, INC. 5562 PROVIDENCE RI
— 401-641 none assigned yet which blocks → METROPCS, INC. 5562 PROVIDENCE RI
— 401-642 3XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PAWTUCKET RI
— 401-643 4XXX5XXX which blocks → PAETEC ITEL, LLC 829J PORTSMOUTH RI
— 401-646 6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 HOPEVALLEY RI
— 401-647 6XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SCITUATE RI
— 401-648 1XXX5XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 PROVIDENCE RI
— 401-651 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOONSOCKET RI
— 401-652 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7351 WOONSOCKET RI
— 401-655 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 BRISTOL RI
— 401-656 0XXX1XXX4XXX5XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WESTERLY RI
— 401-658 6XXX7XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CUMBLND HL RI
— 401-659 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CUMBLND HL RI
— 401-660 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CUMBLND HL RI
— 401-661 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NARRAGNSTT RI
— 401-662 4XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NEWPORT RI
— 401-663 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PAWTUCKET RI
— 401-667 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NO KINGSTN RI
— 401-671 2XXX which blocks → PAETEC ITEL, LLC 829J WOONSOCKET RI
— 401-675 0XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NARRAGNSTT RI
— 401-677 1XXX6XXX7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOPEVALLEY RI
— 401-678 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PASCOAG RI
— 401-679 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-681 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WARWICK RI
— 401-682 0XXX3XXX4XXX7XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 PORTSMOUTH RI
— 401-683 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 PORTSMOUTH RI
— 401-684 1XXX5XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 JAMESTOWN RI
— 401-685 0XXX1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 TIVERTON RI
— 401-691 0XXX1XXX2XXX5XXX6XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WARWICK RI
— 401-696 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX RI
— 401-702 1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - RI 4016 COVENTRY RI
— 401-709 not yet reported which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-710 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PASCOAG RI
— 401-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX RI
— 401-712 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-714 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J PROVIDENCE RI
— 401-715 not yet reported which blocks → ONVOY, LLC - RI 977E GREENWICH RI
— 401-719 6XXX which blocks → PAETEC ITEL, LLC 829J CENTREDALE RI
— 401-721 4XXX5XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-722 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-723 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-724 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-725 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-726 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-727 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-728 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-729 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PAWTUCKET RI
— 401-732 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WARWICK RI

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.