# 121.199.0.21 — IP Intelligence Summary

121.199.0.21 is an IPv4 address operated by ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN (AS37963), with approximate network location Hangzhou, China. As of November 14, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/121.199.0.21
- Last updated: 2026-11-14

## Ownership

- Organization: —
- Network name: ALISOFT
- Allocated block: 121.196.0.0/14
- ASN: AS37963 (https://ipdebrief.com/asn/37963)
- Regional registry: APNIC
- Registered holder: —
- Routing operator: ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN
- Network registration country: CN
- Registrant address country: —

## Location

- City: Hangzhou
- Region: Zhejiang
- Country: China
- Time zone: Asia/Shanghai

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

## DNS posture

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

- caa: Not applicable (—)
- spf: Not checked (—)
- dmarc: Not checked (—)
- dnssec: Unknown / lookup inconclusive (21.0.199.121.in-addr.arpa)
- fcrDns: Not applicable

- TLS probe 443 at 121.199.0.21: Certificate not captured; current certificate unknown (unreachable)
- TLS probe 8443 at 121.199.0.21: Certificate not captured; current certificate unknown (unreachable)
## Witness AI - IP Assessment (AI-generated)

AI-generated assessment. Verify critical details independently.

The target host, 121.199.0.21/32, is part of the ALISOFT network (AS37963), allocated to Alibaba Cloud under the 121.196.0.0/14 CIDR block within the APNIC region. Geolocation data places the network in Hangzhou, Zhejiang, China. Automated assessment yielded a risk score of 0, though the DNS hygiene profile remains unassessed (score 0) with SPF, DMARC, and CAA checks marked as not checked or not applicable, and DNSSEC status unknown. Network role analysis indicates the host is likely firewalled with no active services, as probes to ports 443 and 8443 returned unreachable statuses. Anycast status is unverified. Due to the lack of active service responses and limited DNS validation data, the host is currently characterized as non-interactive; however, this does not definitively rule out latent malicious activity. Continued monitoring is recommended to observe future service activation or behavioral changes.

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Source: IPDebrief, "121.199.0.21 IP intelligence", https://ipdebrief.com/121.199.0.21, updated 2026-11-14. Assessments are probabilistic.