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 712
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 68
QWEST CORPORATION 64
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 48
NEW CINGULAR WIRELESS PCS, LLC - IL 43
ONVOY, LLC - IA 30
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
2015-02-04 712-831 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → GREAT LAKES COMMUNICATION CORP. - IA 345D LAKE PARK IA
2014-10-24 712-383 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → WESTERN IOWA TELEPHONE ASSOCIATION - IA 205H KINGSLEY IA
2013-10-01 712-745 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NO HOPKINS IA
2013-08-02 712-232 0–9 XXXall 10 · 9 holders which blocks → AUREON COMMUNICATIONS, LLC 444G SPENCER IA
2013-08-02 712-318 0–9 XXXall 10 · 6 holders which blocks → AUREON COMMUNICATIONS, LLC 444G COUNCILBLF IA
2013-07-10 712-302 0–9 XXXall 10 · 9 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 GLENWOOD IA
2013-06-04 712-422 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAWARDEN IA
2013-01-07 712-739 0XXX1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DOON IA
2012-07-23 712-377 0XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 GRAVITY IA
2011-12-09 712-459 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HARTLEY IA
2011-03-25 712-442 2XXX4XXX6XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODBINE IA
2010-11-17 712-720 0XXX2XXX7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIBLEY IA
2010-11-17 712-869 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATLOCK IA
2010-11-11 712-522 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
2010-10-29 712-800 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM COMMUNICATIONS OF THE MIDEWEST INC - NE 7816 GLENWOOD IA
2010-07-12 712-590 0XXX5XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASSENA IA
2010-04-30 712-750 not yet reported which blocks → PREMIER COMMUNICATIONS, INC. - IA 904D SIBLEY IA
2010-03-19 712-759 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F SPIRITLAKE IA
2010-03-09 712-497 1XXX2XXX4XXX · 2 holders which blocks → MCC TELEPHONY LLC 593K GLIDDEN IA
2010-03-08 712-357 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY LLC 593K RED OAK IA
2010-03-08 712-850 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCC TELEPHONY LLC 593K CLARINDA IA
2010-02-23 712-415 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F EMMETSBURG IA
2010-02-16 712-220 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY LLC 593K CARROLL IA
2010-02-16 712-588 1XXX5XXX7XXX8XXX · 3 holders which blocks → MCC TELEPHONY LLC 593K AUDUBON IA
2009-11-30 712-454 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 SIOUX CITY IA
2009-11-11 712-828 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COUNCILBLF IA
2009-10-02 712-635 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX CITY IA
2009-03-31 712-904 2XXX5XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 AKRON IA
2008-06-11 712-587 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SIOUX CITY IA
2008-01-22 712-823 1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SERGENTBLF IA
2007-12-11 712-578 1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 HULL IA
2007-11-27 712-975 7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SCHALLER IA
2007-10-24 712-444 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
2007-03-28 712-463 0XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX CTR IA
2007-02-23 712-631 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SHELDON IA
2007-02-14 712-453 9XXX which blocks → MCC TELEPHONY LLC 593K ESSEX IA
2007-02-14 712-939 0XXX3XXX8XXX9XXX · 4 holders which blocks → MCC TELEPHONY LLC 593K VILLISCA IA
2007-02-04 712-922 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 EMMETSBURG IA
2006-10-18 712-400 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKRAPIDS IA
2006-10-18 712-550 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAWARDEN IA
2006-08-22 712-451 8XXX9XXX which blocks → PREMIER COMMUNICATIONS, INC. - IA 904D ROCKVALLEY IA
2006-07-28 712-429 5XXX which blocks → IMON COMMUNICATIONS LLC 7021 SLOAN IA
2006-07-28 712-945 4XXX6XXX · 2 holders which blocks → IMON COMMUNICATIONS LLC 7021 SALIX IA
2006-07-06 712-650 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE VIEW IA
2006-05-30 712-600 0–9 XXXall 10 · 6 holders which blocks → LONG LINES METRO, INC. - IA 828B MISSOURVLY IA
2006-04-27 712-300 not yet reported which blocks → ADVANCED NETWORK COMMUNICATIONS, LLC 7458 IDA GROVE IA
2006-03-08 712-331 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPIRITLAKE IA
2006-03-08 712-392 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ESTHERVL IA
2006-03-08 712-501 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LE MARS IA
2006-03-08 712-630 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANBORN IA

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.