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
	128.2.0.0/16	Carnegie Mellon University
	128.237.0.0/16	Carnegie Mellon University
	192.5.146.0/24	Carnegie Mellon University
	192.12.32.0/24	Carnegie Mellon University
	192.58.107.0/24	Carnegie Mellon University
	192.80.210.0/24	Carnegie Mellon University
	204.194.28.0/22	Carnegie Mellon University
	209.129.244.0/23	CENIC
	2607:fb28::/32	Carnegie Mellon 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 admiring_gould Policy hopeful_sutherland Policy pedantic_heisenberg

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
	AS6461	Zayo Bandwidth	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS5050	Pittsburgh Supercomputing Center	✔	✔

---

Peers

	ASN	Description	IPv4	IPv6
	AS6461	Zayo Bandwidth	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS5050	Pittsburgh Supercomputing Center	✔	✔
	AS399855	Keystone REN, LLC	✔	✘
	AS2153	CENIC	✔	✘
	AS2152	CENIC - CalREN	✔	✘

ASHandle:       AS9
OrgID:          CARNEG-Z
ASName:         CMU-ROUTER
ASNumber:       9
RegDate:        1984-04-17
Updated:        2012-04-02
TechHandle:     CH4-ORG-ARIN
Source:         ARIN



OrgID:          CARNEG-Z
OrgName:        Carnegie Mellon University
CanAllocate:    
Street:         Cyert Hall 215
Street:         5000 Forbes Avenue
City:           Pittsburgh
State/Prov:     PA
Country:        US
PostalCode:     15213
RegDate:        2009-12-01
Updated:        2020-03-27
OrgAdminHandle: CH4-ORG-ARIN
OrgTechHandle:  CH4-ORG-ARIN
OrgAbuseHandle: CMA3-ARIN
OrgNOCHandle:   CH4-ORG-ARIN
Source:         ARIN





OrgAdminHandle:       CH4-ORG-ARIN
OrgAdminName:          Carnegie Mellon Hostmaster
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CH4-ORG-ARIN
OrgTechName:           Carnegie Mellon Hostmaster
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       CMA3-ARIN
OrgAbuseName:          Carnegie Mellon Abuse
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         CH4-ORG-ARIN
OrgNOCName:            Carnegie Mellon Hostmaster
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           CH4-ORG-ARIN
TechName:              Carnegie Mellon Hostmaster
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-09T03:26:23Z UTC

---

Member of the following AS-SETs

-	Member	ASN Count
RADB	as5050:as-peering-abilene	8
APNIC	as-set-ictbs-as141350	4
LEVEL3	as-lumen-customers-asns	10695
LEVEL3	as-level3-origins-na	0
ARIN	as-pennren	55
RADB	as-ccf-test	1461
RIPE	as-incapsula:as-set_stg	31
RADB	as-ccf	1506
ARIN	as399855:as-cone	41
APNIC	as-63529-as-import-as6939	38120
ARIN	as-kinber	71
RADB	as-calren2	289
RADB	as-comcast-edia	2746