Home Prefix Lookup183.170.0.0/16

183.170.0.0/16 - China Education And Research Network Center (AS4538)

IPv4APNICallocatedAS4538ERX-CERNET-BKB - China Education and Research Network CenterNo ROA

CIDR

183.170.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇨🇳 China

City

Beijing

RIR

APNIC

Status

allocated

Allocated

2009-11-23

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
183.170.0.0/16	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	APNICOther IRR	2026-10-13

More-Specific Announcements

24 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
183.170.0.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.0.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.16.0/21	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.16.0/21	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.24.0/21	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.24.0/21	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.32.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.32.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.48.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.48.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.128.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.128.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.144.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.144.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.160.0/20	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.160.0/20	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.176.0/21	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.176.0/21	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.184.0/23	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.184.0/23	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.186.0/23	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.186.0/23	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13
183.170.188.0/22	AS4538 ERX-CERNET-BKB - China Education and Research Network Center	No ROA	-	2026-10-13
183.170.188.0/22	AS24360 CNGI-ZHZ-IX-AS-AP - CERNET2 IX at Zhengzhou University	No ROA	-	2026-10-13

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4538	APNIC	MAINT-CERNET-AP	2009-11-25
AS4538	Other IRR	MAINT-AS4637	2023-11-13

Origin ASN

AS4538

ERX-CERNET-BKB - China Education and Research Network Center

Related Prefixes

More prefixes of AS4538

All prefixes of AS4538 →

Geolocation

Country🇨🇳ChinaCN

RegionBeijing

CityBeijing

Coordinates39.9042, 116.4070 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the APNIC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/183.170.0.0/16

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/183.170.0.0/16" | jq

External Links

RIPEstat