166.111.4.0/24 China Education and Research Network Center
Announced by AS4538 China Education and Research Network Center. RPKI valid Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 166.111.4.0/24
Prefix
Origin
AS4538 ERX-CERNET-BKB
RPKI
RPKI valid
Size
256 addresses
Less specific
More specifics
0
IRR route objects
2 exact, 4 covering
In RouteViews
2026-10-12 08:02 UTC
RPKI
Route origin authorizations
Covered by a ROA authorizing AS4538 to originate 166.111.4.0/24 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 166.111.4.0/24 | /24 | AS4538 ERX-CERNET-BKB | APNIC |
IRR
Route objects
Registered in the IRR for this prefix and the ones covering it. Look it up live.
| Route | Origin | Source | Description | Maintained by |
|---|---|---|---|---|
| 166.111.4.0/24 | AS4538 ERX-CERNET-BKB | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK |
| 166.111.4.0/24 | AS4538 ERX-CERNET-BKB | RADB | CMI (Customer Route) | MAINT-AS58453 |
| 166.111.0.0/17 covering | AS4538 ERX-CERNET-BKB | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK |
| 166.111.0.0/17 covering | AS4538 ERX-CERNET-BKB | RADB | CMI (Customer Route) | MAINT-AS58453 |
| 166.111.0.0/16 covering | AS4538 ERX-CERNET-BKB | RADB | PACNET (proxy-registered route object) | MAINT-AS4637 |
| 166.111.0.0/16 covering | AS45576 CERNET2-TSINGHUA6-AS-AP | RADB | Tsinghua University | MAINT-KIRINO-US |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.