NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 412
VERIZON PENNSYLVANIA, INC. 249
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 86
NEW CINGULAR WIRELESS PCS, LLC - IL 60
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 57
AERIAL COMMUNICATIONS, INC. 49
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
2012-06-26 412-888 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PTTSBGZON1 PA
2012-06-18 412-742 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-04-19 412-522 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-04-09 412-230 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2012-04-09 412-863 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2012-04-06 412-639 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-03-16 412-463 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-03-16 412-515 0–9 XXXall 10 · 8 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2012-03-12 412-430 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PTTSBGZON1 PA
2011-11-07 412-627 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-10-25 412-339 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON1 PA
2011-09-02 412-275 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J PTGSBNZN14 PA
2011-08-30 412-709 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-08-11 412-852 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-05-31 412-354 0–9 XXXall 10 · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
2011-05-11 412-925 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-04-06 412-944 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2011-03-04 412-689 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2011-01-25 412-737 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-01-19 412-315 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2010-09-28 412-439 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2010-07-30 412-538 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTGSBNZN15 PA
2010-02-26 412-328 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON1 PA
2010-01-04 412-295 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2009-09-17 412-518 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2009-09-02 412-416 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
2009-07-14 412-290 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2009-02-26 412-584 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2008-11-13 412-616 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2008-06-24 412-465 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTGSBNZN10 PA
2008-05-13 412-864 0–9 XXXwhole prefix which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
2008-04-18 412-807 0–9 XXXall 10 · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
2007-10-30 412-926 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J PTTSBGZON1 PA
2007-04-23 412-482 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J PTTSBGZON1 PA
2007-04-23 412-530 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J PTTSBGZON5 PA
2006-12-13 412-468 0–9 XXXwhole prefix which blocks → YMAX COMMUNICATIONS CORP. - PA 283E CLAIRTON PA
2006-01-31 412-304 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2006-01-04 412-626 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON8 PA
2005-12-01 412-837 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J PTGSBNZN17 PA
2005-07-09 412-735 0–9 XXXall 10 · 2 holders which blocks → CITYNET PENNSYLVANIA, LLC - PA 657B PTTSBGZON1 PA
2005-04-27 412-651 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2004-10-01 412-301 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON2 PA
2004-10-01 412-458 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON7 PA
2004-10-01 412-668 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON6 PA
2003-12-04 412-228 0–9 XXXall 10 · 5 holders which blocks → CITYNET PENNSYLVANIA, LLC - PA 657B PTTSBGZON1 PA
2003-08-07 412-592 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
2003-02-27 412-499 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON2 PA
2002-11-06 412-549 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 KITTANNING PA
2002-08-14 412-277 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2002-07-12 412-223 0–9 XXXall 10 · 8 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PTTSBGZON2 PA

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.