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
— 302-427 5XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-428 9XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-429 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-430 1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → VERIZON DELAWARE, INC. 9210 MILFORD DE
— 302-432 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 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

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.