AS23397#11086 CME-VEN-AS23397 - Chicago Board of Trade512
AS23406#11087 CHOATEHALLSTEWART - CHOATE, HALL & STEWART, LLP512
IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources