NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 484
PAETEC ITEL, LLC 152
LEVEL 3 COMMUNICATIONS, LLC - PA 129
ONVOY, LLC - PA 78
OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 62
NEW CINGULAR WIRELESS PCS, LLC - DC 53
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
— 484-596 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN28 PA
— 484-598 3XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN26 PA
— 484-600 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - PA 547E KEMPTON PA
— 484-601 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWTRIPOLI PA
— 484-604 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F LENAPE PA
— 484-605 1XXX3XXX4XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LENAPE PA
— 484-606 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
— 484-607 0XXX1XXX5XXX6XXX8XXX · 3 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E LENAPE PA
— 484-608 8XXX which blocks → PAETEC ITEL, LLC 829J LENAPE PA
— 484-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 484-612 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN30 PA
— 484-618 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN28 PA
— 484-621 2XXX3XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN12 PA
— 484-623 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SLATINGTON PA
— 484-624 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 POTTSTOWN PA
— 484-625 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN13 PA
— 484-631 3XXX5XXX6XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 W CHESTER PA
— 484-633 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
— 484-634 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
— 484-637 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FLEETWOOD PA
— 484-638 0–9 XXXall 10 · 3 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
— 484-641 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 KUTZTOWN PA
— 484-642 not yet reported which blocks → ONVOY, LLC - PA 547E KUTZTOWN PA
— 484-646 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 KUTZTOWN PA
— 484-647 0–9 XXXall 10 · 7 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 NEWSMITHVL PA
— 484-648 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J KUTZTOWN PA
— 484-651 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 READING PA
— 484-652 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN14 PA
— 484-653 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J W CHESTER PA
— 484-654 6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN26 PA
— 484-660 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HAMBURG PA
— 484-662 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J HAMBURG PA
— 484-664 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
— 484-665 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 HAMBURG PA
— 484-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E BETHLEHEM PA
— 484-667 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WEST GROVE PA
— 484-668 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J HAMBURG PA
— 484-669 not yet reported which blocks → ONVOY, LLC - PA 547E HAMBURG PA
— 484-671 1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LEESPORT PA
— 484-672 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN30 PA
— 484-674 5XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN30 PA
— 484-675 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
— 484-676 0XXX6XXX9XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN29 PA
— 484-678 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 W CHESTER PA
— 484-679 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN30 PA
— 484-680 7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 484-681 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN30 PA
— 484-682 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 484-683 1XXX5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN30 PA
— 484-684 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN30 PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.