AS402096#18187 NTRS-LD5-P1 - The Northern Trust Company256
AS402097#18188 NTRS-MA5-P1 - The Northern Trust Company256
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