ResearchRouting table, looking glass, RPKI & IRR

202.203.0.0/16 China Education and Research Network Center

Announced by AS4538 China Education and Research Network Center. RPKI not found Seen by 3 of our 5 looking glass sessions.

Summary

What the table says about 202.203.0.0/16

Prefix
202.203.0.0/16
Origin
AS4538 ERX-CERNET-BKB
RPKI
RPKI not found
Size
65,536 addresses
Less specific
202.200.0.0/14 AS4538 ERX-CERNET-BKB
More specifics
22
IRR route objects
0 exact, 2 covering
In RouteViews
2026-10-13 16:03 UTC
Paths

How 202.203.0.0/16 is reached

Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.

AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 36295 6939 4635 4538
OriginAS4538 China Education and Research Network Center
Origin codeIGP
Communities903:100 903:900
Updated5d 22h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 4635 4538
OriginAS4538 China Education and Research Network Center
Origin codeIGP
Communities36295:100
Updated5d 22h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 6939 4635 4538
OriginAS4538 China Education and Research Network Center
Origin codeIGP
Communitiesnone
Updated5d 22h ago
RPKI

Route origin authorizations

No ROA covers this prefix, so RPKI has nothing to say about who may originate it. Validate another origin.

IRR

Route objects

Registered in the IRR for this prefix and the ones covering it. Look it up live.

RouteOriginSourceDescriptionMaintained by
202.202.0.0/15 coveringAS4538 ERX-CERNET-BKBAPNICCERNETMAINT-CERNET-AP
202.192.0.0/12 coveringAS4538 ERX-CERNET-BKBRADBPACNET (proxy-registered route object)MAINT-AS4637
Less specific

Covering prefixes

Announced prefixes that contain this one, most specific first.

202.200.0.0/14 AS4538 ERX-CERNET-BKB202.200.0.0/13 AS4538 ERX-CERNET-BKB202.192.0.0/12 AS4538 ERX-CERNET-BKB
More specific

Prefixes inside 202.203.0.0/16

22 announced prefixes fall inside this one.

Show the 22 prefixes
202.203.2.0/24 AS4538 ERX-CERNET-BKB202.203.16.0/24 AS4538 ERX-CERNET-BKB202.203.32.0/20 AS4538 ERX-CERNET-BKB202.203.48.0/20 AS4538 ERX-CERNET-BKB202.203.64.0/20 AS4538 ERX-CERNET-BKB202.203.66.0/24 AS4538 ERX-CERNET-BKB202.203.80.0/21 AS4538 ERX-CERNET-BKB202.203.112.0/24 AS4538 ERX-CERNET-BKB202.203.128.0/23 AS4538 ERX-CERNET-BKB202.203.132.0/24 AS4538 ERX-CERNET-BKB202.203.136.0/21 AS4538 ERX-CERNET-BKB202.203.144.0/20 AS4538 ERX-CERNET-BKB202.203.144.0/24 AS4538 ERX-CERNET-BKB202.203.160.0/20 AS4538 ERX-CERNET-BKB202.203.160.0/24 AS4538 ERX-CERNET-BKB202.203.176.0/20 AS4538 ERX-CERNET-BKB202.203.176.0/24 AS4538 ERX-CERNET-BKB202.203.187.0/24 AS4538 ERX-CERNET-BKB202.203.192.0/20 AS4538 ERX-CERNET-BKB202.203.208.0/20 AS4538 ERX-CERNET-BKB202.203.224.0/20 AS4538 ERX-CERNET-BKB202.203.240.0/20 AS4538 ERX-CERNET-BKB
Tools

Check 202.203.0.0/16 live

Looking glassIP to ASN APIRPKI APIIRR API