Hostname
proton.com
Last fetched
proton.com resolves to 1 IPv4 address operated by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation in SG. WHOIS lists iana:460 as the registrar.
Nutrition Label
Resolution chain
proton.com resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.
| IP | Prefix | ASN | Operator | Country |
|---|---|---|---|---|
| 52.139.251.148 | 52.136.0.0/13 | AS8075 | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | SG |
WHOIS identity
- Registrar
- iana:460
- Organization
- domain admin
- Contact emails
Subdomains
41 observed subdomains of proton.com.
Showing 25 of 41. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from proton.com in the public web crawl.
355 sites link to this hostname.
25 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
6 SPF mechanisms authorising senders for proton.com.
| Mechanism | Target |
|---|---|
| SPF_INCLUDE | spf.protection.outlook.com |
| SPF_IP | 118.100.117.201 |
| SPF_IP | 121.123.112.148 |
| SPF_IP | 121.123.112.3 |
| SPF_IP | 121.123.112.72 |
| SPF_IP | 121.123.113.35 |
Related pages
Pivot deeper into the graph from proton.com.
- IP · 52.139.251.148
- ASN · AS8075MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation
- Registrar · iana:460
- Country · SG
- Email · reg_193651@whoisprotection.cc
- TLD · .com
- Browse hostnames · pr…
- Glossary · What is a hostname?
- Whisper Internet Directory — home
- Live MOAS conflicts feed
- Threat feed · Spamhaus DROP
- United States internet infrastructure
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "proton.com"})-[:RESOLVES_TO]->(ip:IPV4)
-[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
-[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20Or query Whisper from your own LLM workflow via the Whisper MCP server.