NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 570-941 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCRANTON PA
— 570-942 1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 NICHOLSON PA
— 570-943 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 MCKEANSBG PA
— 570-945 1XXX2XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 FACTORYVL PA
— 570-946 1XXX2XXX3XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 LAPORTE PA
— 570-947 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSTON PA
— 570-949 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ROWLAND PA
— 570-950 not yet reported which blocks → PA
— 570-952 0XXX1XXX2XXX4XXX5XXX6XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 TAMAQUA PA
— 570-953 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CTSI, INC. - PA 7513 DANVILLE PA
— 570-954 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PITTSTON PA
— 570-956 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HAZLETON PA
— 570-958 not yet reported which blocks → PA
— 570-959 not yet reported which blocks → PA
— 570-960 0XXX1XXX2XXX3XXX4XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 FORESTCITY PA
— 570-961 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCRANTON PA
— 570-962 1XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF PENNSYLVANIA, LLC 0209 BEECHCREEK PA
— 570-963 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCRANTON PA
— 570-965 4XXX5XXX7XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 SPRINGVL PA
— 570-966 not yet reported which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 MIFFLINBG PA
— 570-967 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 LAWSVILLE PA
— 570-969 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCRANTON PA
— 570-970 not yet reported which blocks → CTSI, INC. - PA 7513 WILKSBARRE PA
— 570-971 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILLIAMSPT PA
— 570-973 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SCHUYLKILL MOBILE FONE, INC. 6739 SUNBURY PA
— 570-975 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → CTSI, INC. - PA 7513 SUNBURY PA
— 570-976 not yet reported which blocks → PA
— 570-977 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STROUDSBG PA
— 570-978 not yet reported which blocks → SPOK, INC. 6630 MOUNTANTOP PA
— 570-982 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 STROUDSBG PA
— 570-983 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SCRANTON PA
— 570-985 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ASHLAND PA
— 570-986 2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J TAYLOR PA
— 570-988 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SUNBURY PA
— 570-992 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 SAYLORSBG PA
— 570-995 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 TROUT RUN PA
— 570-996 3XXX6XXX7XXX · 3 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 TUNKHANNCK PA
— 570-997 not yet reported which blocks → SPOK, INC. 6630 MOUNTANTOP PA
— 570-998 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 TROUT RUN PA
— 571-201 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
— 571-203 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 571-206 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LEESBURG VA
— 571-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 571-212 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 571-213 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 571-214 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 571-215 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 571-216 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 571-218 0XXX2XXX5XXX6XXX7XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 571-219 not yet reported which blocks → SPOK, INC. 6630 WSNGTNZN08 VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.