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 570
VERIZON PENNSYLVANIA, INC. 156
COMMONWEALTH TELEPHONE COMPANY LLC 75
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 75
NEW CINGULAR WIRELESS PCS, LLC - DC 68
CORE COMMUNICATIONS, INC. - PA 62
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
2007-09-17 570-903 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SCRANTON PA
2007-09-11 570-907 2XXX which blocks → COMCAST IP PHONE, LLC 318J BEECHCREEK PA
2007-07-18 570-625 2XXX3XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K TIOGA PA
2007-07-18 570-944 3XXX4XXX5XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LAWRENCEVL PA
2007-07-17 570-993 0–9 XXXall 10 · 7 holders which blocks → IDT AMERICA, CORP. - PA 213C BLOOMSBURG PA
2007-07-13 570-855 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WILKSBARRE PA
2007-05-21 570-618 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILFORD PA
2007-05-10 570-741 4XXX5XXX6XXX7XXX · 2 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 RINGTOWN PA
2007-05-10 570-816 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 MIFFLINBG PA
2007-05-10 570-987 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 8 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 NUREMBERG PA
2007-05-01 570-235 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WILKSBARRE PA
2007-04-02 570-955 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SCRANTON PA
2007-03-06 570-309 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SCRANTON PA
2006-10-26 570-915 0–9 XXXall 10 · 8 holders which blocks → CTSI, INC. - PA 7513 PINE GROVE PA
2006-10-26 570-968 0–9 XXXall 10 · 8 holders which blocks → CTSI, INC. - PA 7513 ORWIGSBURG PA
2006-09-18 570-991 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WILKSBARRE PA
2006-08-16 570-541 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLEBURG PA
2006-06-27 570-808 0–9 XXXwhole prefix which blocks → CTSI, INC. - PA 7513 WILKSBARRE PA
2006-05-19 570-933 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ASHLAND PA
2006-04-26 570-687 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SCRANTON PA
2006-04-26 570-862 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SCRANTON PA
2006-03-06 570-702 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SCRANTON PA
2006-03-02 570-605 2XXX4XXX5XXX which blocks → ONVOY, LLC - PA 547E MANSFIELD PA
2006-02-16 570-630 0–9 XXXall 10 · 6 holders which blocks → CTSI, INC. - PA 7513 LAKE ARIEL PA
2006-02-09 570-508 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WATSONTOWN PA
2005-06-10 570-701 0–9 XXXall 10 · 8 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 NORTHUBRLD PA
2005-02-25 570-877 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SCRANTON PA
2005-01-20 570-787 7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WELLSBORO PA
2004-11-23 570-369 0–9 XXXall 10 · 4 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 STROUDSBG PA
2004-09-30 570-832 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MILFORD PA
2004-09-28 570-867 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAYRE PA
2004-09-21 570-423 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SAYRE PA
2004-09-10 570-396 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MONTROSE PA
2004-09-10 570-529 6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TROY PA
2004-09-10 570-637 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TOWANDA PA
2004-09-10 570-721 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WYALUSING PA
2004-08-25 570-404 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MANSFIELD PA
2004-08-25 570-418 4XXX5XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TIOGA PA
2004-08-25 570-439 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WELLSBORO PA
2004-07-26 570-250 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWANDA PA
2004-07-26 570-750 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAPORTE PA
2004-07-20 570-731 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F SAYRE PA
2004-07-19 570-249 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 JIM THORPE PA
2004-07-19 570-335 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 SCRANTON PA
2004-05-26 570-217 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MIFFLINBG PA
2004-05-24 570-302 0XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 COVINGTON PA
2004-05-17 570-319 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CLARKSSMMT PA
2004-05-17 570-359 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CNYNGHDRMS PA
2004-01-27 570-878 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SCRANTON PA
2004-01-27 570-972 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MT POCONO 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.