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
— 610-944 2XXX4XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 FLEETWOOD PA
— 610-945 4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN30 PA
— 610-946 2XXX3XXX6XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN13 PA
— 610-947 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NETCARRIER TELECOM, INC. - PA 5494 PHPHSBZN26 PA
— 610-948 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 ROYERSFORD PA
— 610-949 8XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN23 PA
— 610-950 not yet reported which blocks → PA
— 610-951 0XXX1XXX4XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 KRESGEVL PA
— 610-952 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
— 610-954 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 BETHLEHEM PA
— 610-956 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN12 PA
— 610-957 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN14 PA
— 610-958 not yet reported which blocks → PA
— 610-959 not yet reported which blocks → PA
— 610-960 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN29 PA
— 610-961 1XXX2XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J KENNETT SQ PA
— 610-962 3XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-963 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN26 PA
— 610-964 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-965 not yet reported which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 EMMAUS PA
— 610-966 not yet reported which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 EMMAUS PA
— 610-967 7XXX8XXX which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 EMMAUS PA
— 610-968 0XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 EXTON PA
— 610-970 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSTOWN PA
— 610-971 7XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-972 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
— 610-973 4XXX5XXX7XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ALLENTOWN PA
— 610-974 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 BETHLEHEM PA
— 610-975 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-976 not yet reported which blocks → PA
— 610-977 1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN26 PA
— 610-978 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SLATINGTON PA
— 610-980 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN23 PA
— 610-981 1XXX2XXX4XXX6XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-982 1XXX4XXX7XXX8XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 UPBLCKEDDY PA
— 610-983 5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHOENIXVL PA
— 610-984 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → AT&T - LOCAL 7421 BETHLEHEM PA
— 610-986 0XXX2XXX · 2 holders which blocks → METROPCS, INC. 5562 PHPHSBZN24 PA
— 610-987 not yet reported which blocks → WINDSTREAM CONESTOGA, INC. 0162 OLEY PA
— 610-988 3XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 READING PA
— 610-989 2XXX7XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-991 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EASTON PA
— 610-992 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-993 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-994 not yet reported which blocks → PAETEC ITEL, LLC 829J PHPHSBZN30 PA
— 610-995 6XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-996 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
— 610-997 none assigned yet which blocks → VERIZON PENNSYLVANIA, INC. 9208 BETHLEHEM PA
— 610-998 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 OXFORD PA
— 610-999 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 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.