NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 610
VERIZON PENNSYLVANIA, INC. 325
NEW CINGULAR WIRELESS PCS, LLC - DC 56
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 43
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 39
TELEPORT COMMUNICATIONS AMERICA, LLC - PA 38
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
— 610-286 not yet reported which blocks → WINDSTREAM CONESTOGA, INC. 0162 MORGANTOWN PA
— 610-287 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCHWENKSVL PA
— 610-288 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
— 610-289 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLENTOWN PA
— 610-290 2XXX3XXX6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN30 PA
— 610-291 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
— 610-292 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-293 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-294 1XXX2XXX7XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 UHLERSTOWN PA
— 610-295 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 ALLENTOWN PA
— 610-296 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-297 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 BETHLEHEM PA
— 610-298 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 NEWTRIPOLI PA
— 610-299 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN10 PA
— 610-303 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN25 PA
— 610-304 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
— 610-305 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN25 PA
— 610-306 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-307 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN25 PA
— 610-308 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-309 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN25 PA
— 610-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 610-312 1XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN30 PA
— 610-313 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-315 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN25 PA
— 610-316 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-317 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 BETHLEHEM PA
— 610-318 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN12 PA
— 610-319 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN13 PA
— 610-320 2XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 READING PA
— 610-321 3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 EAGLE PA
— 610-322 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-323 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSTOWN PA
— 610-324 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-325 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN22 PA
— 610-326 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSTOWN PA
— 610-327 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSTOWN PA
— 610-328 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN13 PA
— 610-329 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-330 7XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 EASTON PA
— 610-331 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
— 610-332 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BETHLEHEM PA
— 610-333 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 EASTON PA
— 610-334 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
— 610-335 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 KENNETT SQ PA
— 610-336 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
— 610-337 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-338 5XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN13 PA
— 610-339 not yet reported which blocks → SPOK, INC. 6630 ALLENTOWN PA
— 610-341 none assigned yet which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA

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.