NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
2017-10-26 806-526 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GROOM TX
2017-10-26 806-529 3XXX7XXX9XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WILDORADO TX
2017-10-26 806-540 0XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 VEGA TX
2017-10-26 806-563 0XXX1XXX6XXX7XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SUNRAY TX
2017-10-26 806-571 6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WELLINGTON TX
2017-10-26 914-252 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 OSSINING NY
2017-10-25 214-892 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MCKINNEY TX
2017-10-25 318-593 0–9 XXXall 10 · 6 holders which blocks → NORTHEAST TELEPHONE SERVICES - LA 127J BASTROP LA
2017-10-25 346-280 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CYPRESS TX
2017-10-25 385-293 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E AMERCNFORK UT
2017-10-25 386-221 0–9 XXXall 10 · 8 holders which blocks → ORLANDO TELEPHONE COMPANY DBA SUMMIT BROADBAND 7857 DEBARY FL
2017-10-25 423-466 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2017-10-25 423-501 0–9 XXXall 10 · 4 holders which blocks → SKYBEST COMMUNICATIONS, INC. - TN 081J MOUNTAINCY TN
2017-10-25 438-334 not yet reported which blocks → Bell Mobility 6574 Montreal —
2017-10-25 469-349 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2017-10-25 534-201 1XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CAMERON WI
2017-10-25 534-238 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DRUMMOND WI
2017-10-25 534-239 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GRANDVIEW WI
2017-10-25 534-313 3XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA POINTE WI
2017-10-25 534-331 1XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 IRON RIVER WI
2017-10-25 534-421 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MARENGO WI
2017-10-25 539-609 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 581-397 not yet reported which blocks → Bell Mobility 6574 Quebec —
2017-10-25 813-439 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2017-10-25 947-204 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILFDWH LK MI
2017-10-24 206-702 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-10-24 320-381 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MN 184D CLARKFIELD MN
2017-10-24 412-909 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2017-10-24 517-722 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 MASON MI
2017-10-24 606-449 0–9 XXXall 10 · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C MIDDLESBO KY
2017-10-24 864-733 0–9 XXXall 10 · 7 holders which blocks → SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC 527H GRAY COURT SC
2017-10-23 224-266 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ELK GROVE IL
2017-10-23 234-237 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2017-10-23 312-392 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2017-10-23 779-246 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROCHELLE IL
2017-10-20 239-238 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NAPLES FL
2017-10-20 312-736 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2017-10-20 312-741 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J CHICGOZN01 IL
2017-10-20 406-306 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MT 453F MANHATTAN MT
2017-10-20 959-208 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2017-10-19 206-945 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SEATTLE WA
2017-10-19 208-616 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BOISE ID
2017-10-19 218-292 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MN 184D BEAR RIVER MN
2017-10-19 223-777 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E STRASBURG PA
2017-10-19 312-639 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2017-10-19 312-728 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2017-10-19 316-358 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WICHITA KS
2017-10-19 458-232 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 KLAMATHFLS OR
2017-10-19 507-605 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - MN 184D BREWSTER MN
2017-10-19 608-507 1XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BOAZ WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.