NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2013-09-09 302-803 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2013-05-28 302-502 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WILMINGTON DE
2013-04-23 302-273 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NEWARK DE
2013-04-11 302-501 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 NEW CASTLE DE
2013-04-04 302-440 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F DELAWARECY DE
2012-10-17 302-203 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
2012-06-07 302-401 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2012-05-22 302-304 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2012-01-26 302-212 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 REHOBOTH DE
2011-09-23 302-281 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 HOLLY OAK DE
2011-09-22 302-268 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
2011-09-07 302-660 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - DE 7220 WILMINGTON DE
2011-06-20 302-257 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F DOVER DE
2011-03-30 302-259 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 GEORGETOWN DE
2011-03-10 302-480 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 DOVER DE
2010-10-11 302-300 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2010-09-28 302-585 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOCKESSIN DE
2010-09-27 302-400 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW CASTLE DE
2010-09-27 302-499 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2010-09-07 302-520 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - DE 969E DELAWARECY DE
2010-08-31 302-408 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOLLY OAK DE
2010-08-31 302-414 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW CASTLE DE
2010-08-31 302-597 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2010-08-30 302-517 0XXX1XXX2XXX3XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - DE 969E HOCKESSIN DE
2010-08-30 302-583 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2010-07-20 302-413 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 NEW CASTLE DE
2010-07-08 302-415 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2010-07-06 302-616 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE MID-ATLANTIC, LLC - DE 826F OCEAN VIEW DE
2010-05-11 302-332 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2010-02-12 302-409 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - DE 073F WILMINGTON DE
2010-01-12 302-396 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
2010-01-11 302-319 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2009-07-06 302-922 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 CAMDEN DE
2009-07-06 302-932 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2009-03-13 302-394 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F WILMINGTON DE
2009-03-06 302-272 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 CAMDEN DE
2009-03-06 302-362 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
2009-01-09 302-333 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILMINGTON DE
2008-11-06 302-416 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2008-11-06 302-538 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 CAMDEN DE
2008-09-05 302-287 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2008-07-29 302-468 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2008-06-06 302-358 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2008-05-08 302-357 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2008-03-05 302-298 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 WILMINGTON DE
2006-11-21 302-200 0–9 XXXall 10 · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - DE 279E LEWES DE
2006-11-07 302-256 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WILMINGTON DE
2006-08-11 302-519 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
2006-08-11 302-535 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 CAMDEN DE
2006-05-15 302-464 0–9 XXXall 10 · 6 holders which blocks → IDT AMERICA, CORP. - DE 312C MIDDLETOWN DE

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.