NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2003-01-09 573-213 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 BOWLNGGREN MO
2003-01-09 573-217 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CAMPBELL MO
2003-01-09 573-240 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CENTER MO
2003-01-09 573-250 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CLARKSVL MO
2003-01-09 573-260 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CLIMAX SPG MO
2003-01-09 661-350 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2003-01-09 806-688 not yet reported which blocks → VEXUS 4913 PAMPA TX
2003-01-09 845-389 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON NY
2003-01-09 845-399 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON NY
2003-01-09 845-453 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POUGHKEPSI NY
2003-01-09 845-464 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POUGHKEPSI NY
2003-01-09 845-505 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POUGHKEPSI NY
2003-01-09 845-542 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWBURGH NY
2003-01-09 845-706 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON NY
2003-01-09 845-798 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MONTICELLO NY
2003-01-09 845-866 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MONTICELLO NY
2003-01-09 915-975 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C EL PASO TX
2003-01-09 920-475 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APPLETON WI
2003-01-08 256-630 4XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FORT PAYNE AL
2003-01-08 304-821 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 INWOOD WV
2003-01-08 308-229 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 LYMAN NE
2003-01-08 507-475 5XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 OWATONNA MN
2003-01-08 978-953 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOPSFIELD MA
2003-01-07 218-339 not yet reported which blocks → TEKSTAR COMMUNICATIONS, INC. 4156 CASS LAKE MN
2003-01-07 253-299 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SUMNER WA
2003-01-07 307-201 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WY 9416 JACKSON WY
2003-01-07 352-353 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ARCHER FL
2003-01-07 352-354 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J NEWBERRY FL
2003-01-07 352-356 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J OLD TOWN FL
2003-01-07 352-358 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J HAWTHORNE FL
2003-01-07 352-388 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J YANKEETOWN FL
2003-01-07 352-389 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J MICANOPY FL
2003-01-07 352-533 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DUNNELLON FL
2003-01-07 352-535 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J CHIEFLAND FL
2003-01-07 423-441 0–9 XXXall 10 · 6 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C CUMBERLDGP TN
2003-01-07 509-203 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GRANDVIEW WA
2003-01-07 601-653 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NATCHEZ MS
2003-01-07 601-667 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 CANTON MS
2003-01-07 601-680 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MCCOMB MS
2003-01-07 601-682 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 LAUREL MS
2003-01-07 785-207 5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 TOPEKA KS
2003-01-07 802-855 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VT 6390 RUTLAND VT
2003-01-07 812-515 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → BLUERIVER COMMUNICATIONS, INC. - IN 8943 SEYMOUR IN
2003-01-07 812-545 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BEDFORD IN
2003-01-07 812-560 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → METROPCS, INC. 5562 GREENSBURG IN
2003-01-07 812-572 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CORYDON IN
2003-01-07 812-651 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → METROPCS, INC. 5562 GREENSBURG IN
2003-01-07 814-457 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWBTHLHEM PA
2003-01-07 828-446 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HICKORY NC
2003-01-07 828-447 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 RUTHEFRDTN NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.