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
2006-01-21 302-824 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2006-01-04 302-604 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 GEORGETOWN DE
2005-04-25 302-543 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
2005-04-14 302-276 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 NEW CASTLE DE
2005-02-03 302-650 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J WILMINGTON DE
2004-11-08 302-482 0–9 XXXall 10 · 6 holders which blocks → D-TEL, LLC - DE 0935 WILMINGTON DE
2004-06-22 302-288 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WILMINGTON DE
2004-06-07 302-338 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEWARK DE
2004-06-07 302-340 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2004-06-07 302-341 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEWARK DE
2004-06-07 302-361 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOCKESSIN DE
2004-06-07 302-370 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW CASTLE DE
2004-06-07 302-371 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOLLY OAK DE
2004-06-07 302-372 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOCKESSIN DE
2004-06-07 302-374 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOLLY OAK DE
2004-06-07 302-380 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2004-04-30 302-347 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GEORGETOWN DE
2004-04-30 302-348 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GEORGETOWN DE
2003-08-29 302-299 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J WILMINGTON DE
2002-07-05 302-293 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
2002-02-19 302-290 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
2001-07-19 302-897 not yet reported which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
2001-06-21 302-525 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2001-06-21 302-526 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2001-06-06 302-668 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J WILMINGTON DE
2001-04-23 302-250 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
2001-04-16 302-898 not yet reported which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 WILMINGTON DE
2001-03-27 302-439 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 HOLLY OAK DE
2001-03-21 302-222 4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 CAMDEN DE
2001-03-19 302-264 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 DOVER DE
2001-03-19 302-265 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILFORD DE
2001-03-09 302-780 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 DELMAR DE
2001-03-09 302-782 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 DOVER DE
2001-03-09 302-783 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 LEWES DE
2001-03-09 302-787 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 NEW CASTLE DE
2001-03-09 302-788 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 SELBYVILLE DE
2001-03-09 302-789 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 WILMINGTON DE
2001-02-09 302-245 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
— 302-204 not yet reported which blocks → ONVOY, LLC - DE 969E ANGOLA DE
— 302-205 not yet reported which blocks → ONVOY, LLC - DE 969E BRIDGEVL DE
— 302-206 not yet reported which blocks → ONVOY, LLC - DE 969E CAMDEN DE
— 302-207 not yet reported which blocks → ONVOY, LLC - DE 969E DAGSBORO DE
— 302-208 not yet reported which blocks → ONVOY, LLC - DE 969E DELAWARECY DE
— 302-209 not yet reported which blocks → ONVOY, LLC - DE 969E DELMAR DE
— 302-210 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 XXXXXXXXXX DE
— 302-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX DE
— 302-213 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
— 302-214 not yet reported which blocks → ONVOY, LLC - DE 969E FELTON DE
— 302-216 not yet reported which blocks → ONVOY, LLC - DE 969E FREDERICA DE
— 302-217 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 GEORGETOWN 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.