🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`developer.is-a.dev`

	CNAME	`sup4321.github.io`
	DNSSEC	⚠️ Not signed
	A	2606:50c0:8000::153^{🇺🇸 Fastly2606:50c0:8000::/48 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8001::153^{🇺🇸 Fastly2606:50c0:8001::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8002::153^{🇺🇸 Fastly2606:50c0:8002::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8003::153^{🇺🇸 Fastly2606:50c0:8003::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
	A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
	A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
	A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}

`is-a.dev`

	DNSSEC	🔒 Signed (DS record present)
	A	2606:50c0:8000::153^{🇺🇸 Fastly2606:50c0:8000::/48 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8001::153^{🇺🇸 Fastly2606:50c0:8001::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8002::153^{🇺🇸 Fastly2606:50c0:8002::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8003::153^{🇺🇸 Fastly2606:50c0:8003::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
	A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
	A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
	A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}
	NS	`ns1.is-a.dev` ⭐
	NS	`ns2.is-a.dev`
	NS	`ns3.is-a.dev`
	NS	`ns4.is-a.dev`
	MX	`route1.mx.cloudflare.net` ⭐
	MX	`route3.mx.cloudflare.net`⁽³⁶⁾
	MX	`route2.mx.cloudflare.net`⁽⁶²⁾
	TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
	SOA	`ns1.is-a.dev`dns@cloudflare.com serial=2413956867

rank #86243 globally
rank #84 in the tld

is-a.dev

is-a.dev is a free service that lets developers claim a personalized subdomain (e.g.yourname.is-a.dev) by submitting a pull request to a public GitHub repository. It is run as an open-source, community-driven project rather than a commercial company.

Key facts

Owner / operator: is-a.dev project maintainers (open-source community, hosted via GitHub)
TLD:.dev— gTLD (Google-operated, HSTS-preloaded)
Primary purpose: free subdomain hosting/registration for developer projects and personal sites
Status: active

Notable subdomains or services

yourname.is-a.dev— custom subdomains issued to individual users/projects via GitHub pull request, typically pointed at personal sites, portfolios, or other hosting services

📈 Tranco rank: #119,461

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Similar names

Previous names

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DNS History

1 record (1 active, 0 former)

●CNAMEsup4321.github.io2026-09-03 → 2026-09-03 · 2 obs

● 2026-09-03 13:17:14
● 2026-09-03 21:49:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld5.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com...	-
is-a.dev	ns1.is-a.dev, ns3.is-a.dev, ns4.is-a.dev, ns2.is-a.dev	8 records

✅ Authoritative Response

Server:162.159.3.228

NS records: ns1.is-a.dev, ns3.is-a.dev, ns4.is-a.dev, ns2.is-a.dev

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 261ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`sup4321.github.io`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (ns2.is-a.dev, ns2.is-a.dev, ns1.is-a.dev...)

Analysis

IP Addresses

developer.is-a.dev points to 8 IP addresses, including 185.199.108.153, 185.199.109.153 and 185.199.110.153, plus 5 other.

ywteam.online, silverandcare.com, ubckaba.com plus two other host names have IP numbers in common with developer.is-a.dev.

developer.is-a.dev - robtex.com