# 121.200.5.37 — IP Intelligence Summary

121.200.5.37 is an IPv4 address announced by AS4764, with approximate network location Melbourne, Australia. Its reverse DNS name is 121-200-5-37.79c805.syd.nbn.aussiebb.net. As of November 12, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/121.200.5.37
- Last updated: 2026-11-12

## Ownership

- Organization: IRT-AU-AUSSIEFIBRE
- Network name: WIDEBAND
- Allocated block: 121.200.5.0/24
- ASN: AS4764 (https://ipdebrief.com/asn/4764)
- Regional registry: APNIC
- Registered holder: IRT-AU-AUSSIEFIBRE
- Routing operator: —
- Network registration country: AU
- Registrant address country: —

## Location

- City: Melbourne
- Region: VIC
- Country: Australia
- Time zone: Australia/Melbourne

Approximate network location; registration and certificate addresses are not server-location evidence.

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: no
- Anycast: Unverified (not proof of unicast)
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- 121-200-5-37.79c805.syd.nbn.aussiebb.net
- Forward-confirmed: yes

## DNS posture

Mail authentication and CAA are optional domain policies, not IP-wide requirements.

- spf: Not checked
- dmarc: Not checked
- fcrDns: Not checked
- dnssec: Not checked
- caa: Not checked

## Nearby addresses

- 121.200.5.25 (https://ipdebrief.com/121.200.5.25)
- 121.200.5.105 (https://ipdebrief.com/121.200.5.105)
- 121.200.5.114 (https://ipdebrief.com/121.200.5.114)
- 121.200.5.166 (https://ipdebrief.com/121.200.5.166)
- 121.200.5.209 (https://ipdebrief.com/121.200.5.209)
- 121.200.5.236 (https://ipdebrief.com/121.200.5.236)

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Source: IPDebrief, "121.200.5.37 IP intelligence", https://ipdebrief.com/121.200.5.37, updated 2026-11-12. Assessments are probabilistic.