View

If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	128.220.0.0/16	Johns Hopkins University
	162.129.0.0/16	The Johns Hopkins Medical Institutions
	192.12.13.0/24	Johns Hopkins University
	192.12.14.0/24	Johns Hopkins University
	198.57.32.0/21	Johns Hopkins All Children's Hospital, Inc.
	198.57.37.0/24	Johns Hopkins All Children's Hospital, Inc.
	198.57.39.0/24	Johns Hopkins All Children's Hospital, Inc.
	198.57.40.0/22	Johns Hopkins All Children's Hospital, Inc.
	204.124.184.0/22	Johns Hopkins All Children's Hospital, Inc.
	2606:2b00::/32	Johns Hopkins University

---

Network Policy

Click here to learn more about what this graph means and what makes up a network policy Global Aggregation (disabled due to size) Policy youthful_lalande Policy peaceful_yalow Policy competent_moore Policy clever_stallman

Chart Display Options

Display links using non straight lines

Prefixes in selected policy

Load all prefixes in policy

---

How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3356	Lumen (Level 3)	✔	✘
	AS6939	Hurricane Electric LLC	✔	✔
	AS174	Cogent Communications	✔	✘
	AS396450	Internet2	✔	✘

---

Peers

	ASN	Description	IPv4	IPv6
	AS6939	Hurricane Electric LLC	✔	✔
	AS3356	Lumen (Level 3)	✔	✘
	AS174	Cogent Communications	✔	✘
	AS10886	University of Maryland	✔	✔
	AS77	Johns Hopkins University Applied Physics Laboratory	✔	✘
	AS396450	Internet2	✔	✘

ASHandle:       AS5723
OrgID:          JHU-Z
ASName:         JHU
ASNumber:       5723
RegDate:        1995-09-06
Updated:        2020-09-08
Source:         ARIN



OrgID:          JHU-Z
OrgName:        Johns Hopkins University
CanAllocate:    
Street:         Hopkins Information Technology Services
Street:         3400 North Charles Street
Street:         Garland Hall, Suite 020
City:           Baltimore
State/Prov:     MD
Country:        US
PostalCode:     21218
RegDate:        2020-08-28
Updated:        2020-08-28
OrgAdminHandle: DZ24-ARIN
OrgTechHandle:  DZ24-ARIN
OrgAbuseHandle: DZ24-ARIN
Source:         ARIN





OrgAdminHandle:       DZ24-ARIN
OrgAdminName:          Network Operation Center
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        DZ24-ARIN
OrgTechName:           Network Operation Center
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       DZ24-ARIN
OrgAbuseName:          Network Operation Center
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-04-16T03:29:42Z UTC

---

Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-ubnix-members	17560
RADB	as-hurricane	23453
ARIN	as-zenedge	3244
ARIN	as5723:as-5723-all	2
RIPE	as-transroute-spec	17663
RADB	as198949:as-sd	3714
RADB	as-hurricanev6	17623