NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 302
NEW CINGULAR WIRELESS PCS, LLC - DC 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
— 302-433 0XXX1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-434 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-435 not yet reported which blocks → SPOK, INC. 6630 WILMINGTON DE
— 302-436 3XXX which blocks → VERIZON DELAWARE, INC. 9210 SELBYVILLE DE
— 302-437 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLETOWN DE
— 302-438 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
— 302-441 not yet reported which blocks → REDI-CALL COMMUNICATIONS CO. 6810 MILFORD DE
— 302-442 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
— 302-444 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 NEWARK DE
— 302-448 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
— 302-449 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
— 302-450 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DOVER DE
— 302-451 9XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-452 4XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-453 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-454 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-455 2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-456 2XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-457 7XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-458 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-460 0–9 XXXwhole prefix which blocks → CORETEL DELAWARE, INC. - DE 1991 DELAWARECY DE
— 302-462 2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 DELMAR DE
— 302-463 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
— 302-465 3XXX4XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 DOVER DE
— 302-466 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 DELMAR DE
— 302-467 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-469 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 FELTON DE
— 302-472 not yet reported which blocks → PAETEC ITEL, LLC 829J WILMINGTON DE
— 302-474 not yet reported which blocks → SPOK, INC. 6630 WILMINGTON DE
— 302-475 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 HOLLY OAK DE
— 302-476 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-477 7XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-478 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-479 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-481 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GUMBORO DE
— 302-483 7XXX which blocks → PAETEC ITEL, LLC 829J WILMINGTON DE
— 302-489 4XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HOCKESSIN DE
— 302-491 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 MILFORD DE
— 302-492 2XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 HARTLY DE
— 302-494 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
— 302-495 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J GREENWOOD DE
— 302-497 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 LAUREL DE
— 302-498 1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-500 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE MID-ATLANTIC, LLC - DE 826F GEORGETOWN DE
— 302-504 4XXX5XXX6XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WILMINGTON DE
— 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

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.