AS6618 Johns Hopkins HealthCare

JOHNS-122 - Johns Hopkins HealthCare · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,726largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#63,092of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS6618 in ASN lookup Look up an IP in this network (12.181.141.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

12.181.141.0/24

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ASNNameIPv4 addresses

AS6434#13723 PIERPONTSECURITIES - Amherst Pierpont Securities256

AS6500#13724 NEXUS-22-6500 - Nexusguard, Inc256

AS6531#13725 COFFEYCAN - Burlington USD #244256

AS6642#13727 DATASPHERE-TRANSIT - Hyper Group Network LLC256

AS6645#13728 OLEAN-GENERAL-HOSPITAL - OLEAN GENERAL HOSPITAL256

AS6651#13729 GEMINI-EXCHANGE - Gemini256

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