# 209.91.216.91 — IP Intelligence Summary

209.91.216.91 is an IPv4 address operated by CRITICALHUBNET - Critical Hub Networks, PR (AS23114), with approximate network location San Juan, Puerto Rico. Its reverse DNS name is sant-core2-mx-100.criticalhub.com. As of November 14, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/209.91.216.91
- Last updated: 2026-11-14

## Ownership

- Organization: Caribbean Internet Service
- Network name: CARIBE97
- Allocated block: 209.91.192.0/18
- ASN: AS23114 (https://ipdebrief.com/asn/23114)
- Regional registry: ARIN
- Registered holder: Caribbean Internet Service
- Routing operator: CRITICALHUBNET - Critical Hub Networks, PR
- Network registration country: United States
- Registrant address country: —

## Location

- City: San Juan
- Region: —
- Country: Puerto Rico
- Time zone: —

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

- sant-core2-mx-100.criticalhub.com
- Forward-confirmed: no

## DNS posture

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

- caa: Not found at queried name (com)
- spf: Not found at queried name (sant-core2-mx-100.criticalhub.com)
- dmarc: Not found at queried name (_dmarc.sant-core2-mx-100.criticalhub.com)
- dnssec: Unknown / lookup inconclusive (91.216.91.209.in-addr.arpa)
- fcrDns: Not found at queried name (sant-core2-mx-100.criticalhub.com)

## Nearby addresses

- 209.91.216.92 (https://ipdebrief.com/209.91.216.92)

## Addresses sharing infrastructure

- 209.91.199.2 — Same abuse contact (https://ipdebrief.com/209.91.199.2)

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Source: IPDebrief, "209.91.216.91 IP intelligence", https://ipdebrief.com/209.91.216.91, updated 2026-11-14. Assessments are probabilistic.