NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 302-507 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
— 302-508 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J SMYRNA DE
— 302-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX DE
— 302-514 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SMYRNA DE
— 302-521 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
— 302-523 not yet reported which blocks → REDI-CALL COMMUNICATIONS CO. 6810 WILMINGTON DE
— 302-524 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SELBYVILLE DE
— 302-527 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J FELTON DE
— 302-528 3XXX4XXX5XXX6XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-529 6XXX which blocks → VERIZON DELAWARE, INC. 9210 HOLLY OAK DE
— 302-530 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-531 5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J CAMDEN DE
— 302-533 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 NEWARK DE
— 302-536 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J SEAFORD DE
— 302-537 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 OCEAN VIEW DE
— 302-539 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 OCEAN VIEW DE
— 302-540 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-541 1XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 OCEAN VIEW DE
— 302-542 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
— 302-544 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW CASTLE DE
— 302-545 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-547 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-549 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F ANGOLA DE
— 302-552 1XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST DE
— 302-559 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
— 302-561 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW CASTLE DE
— 302-562 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW CASTLE DE
— 302-563 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLETOWN DE
— 302-564 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SELBYVILLE DE
— 302-565 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
— 302-566 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 HARRINGTON DE
— 302-569 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J REHOBOTH DE
— 302-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 HARTLY DE
— 302-571 2XXX3XXX · 2 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-572 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J FREDERICA DE
— 302-573 0XXX1XXX9XXX · 2 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-574 0XXX2XXX6XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-575 2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-576 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-577 0XXX9XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-578 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 GUMBORO DE
— 302-581 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J OCEAN VIEW DE
— 302-584 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-588 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
— 302-593 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-594 0XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-595 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 DELAWARECY DE
— 302-598 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-602 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NETCARRIER TELECOM, INC. - DE 274E NEWARK DE

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.