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
— 412-207 3XXX4XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTTSBGZON6 PA
— 412-208 4XXX5XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
— 412-209 5XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
— 412-210 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 XXXXXXXXXX PA
— 412-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 412-213 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTGSBNZN18 PA
— 412-215 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
— 412-216 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
— 412-217 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WASHINGTON PA
— 412-220 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN13 PA
— 412-221 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN13 PA
— 412-222 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTTSBGZON1 PA
— 412-224 0–9 XXXall 10 · 6 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 8597 PTTSBGZON1 PA
— 412-225 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
— 412-226 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 CLAIRTON PA
— 412-227 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-231 9XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-232 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-233 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 CLAIRTON PA
— 412-234 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-235 0XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON1 PA
— 412-236 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-237 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-238 2XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON2 PA
— 412-241 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-242 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-243 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-244 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-246 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PTTSBGZON1 PA
— 412-247 8XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-249 9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTGSBNZN14 PA
— 412-250 5XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PTTSBGZON7 PA
— 412-251 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON1 PA
— 412-252 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTTSBGZON3 PA
— 412-254 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON6 PA
— 412-255 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-256 4XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 PA
— 412-257 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN13 PA
— 412-258 0XXX5XXX7XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
— 412-259 0XXX2XXX3XXX5XXX6XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTGSBNZN16 PA
— 412-260 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
— 412-261 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-262 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN15 PA
— 412-263 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-264 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN15 PA
— 412-266 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
— 412-268 0XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON1 PA
— 412-269 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTGSBNZN15 PA
— 412-270 not yet reported which blocks → SPOK, INC. 6630 PTGSBNZN14 PA
— 412-271 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PTTSBGZON4 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.