classr.com - dns.ninja
classr.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 54.74.135.134🇮🇪 Amazon54.74.0.0/15 EC2 DUB prefix | ||||||
| PTR | ec2-54-74-135-134.eu-west-1.compute.amazonaws.com | ||||||
| NS | ns1.ext.lighting.com ⭐ | ||||||
| A | 2a01:ce89:8001:0:57:67:40:21🇫🇷 OBS-Internet2a01:ce89:8000::/36 FR country aggregate | ||||||
| PTR | ns1.ext.lighting.com | ||||||
| A | 57.67.40.21🇫🇷 OBS-Internet57.67.0.0/17 FR aggregate | ||||||
| PTR | ns1.ext.lighting.com | ||||||
| NS | ns2.ext.lighting.com | ||||||
| A | 2a01:ce95:4001:100:57:77:21:77🇺🇸 OBS-Internet2a01:ce95:4000::/36 US North East country aggregate | ||||||
| PTR | ns2.ext.lighting.com | ||||||
| A | 57.77.21.77🇺🇸 SITA57.77.21.0/24 | ||||||
| PTR | ns2.ext.lighting.com | ||||||
| NS | ns3.ext.lighting.com | ||||||
| A | 2a01:ce9d:1:0:57:73:36:69🇸🇬 OBS-Internet2a01:ce9d::/36 SG country aggregate | ||||||
| PTR | ns3.ext.lighting.com | ||||||
| A | 57.73.36.69🇸🇬 OBS-Internet57.73.0.0/17 SG aggregate | ||||||
| PTR | ns3.ext.lighting.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns1.ext.lighting.comddi-authority@signify.com serial=67 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785161932 | ||||||
Same first word
Similar names
DNS History
7 records (4 active, 3 former)
○NScitssdns1.citss.com2015-08-29 → 2016-12-14 · 4 obs
● 2016-12-14 06:18:50
○ 2026-02-17 00:03:56
○ 2026-07-27 14:41:20
○NScitssdns2.citss.com2015-08-29 → 2016-12-14 · 4 obs
● 2016-12-14 06:18:50
○ 2026-02-17 00:03:56
○ 2026-07-27 14:41:20
●NSns1.ext.lighting.com2026-02-17 → 2026-07-27 · 3 obs
● 2026-02-17 00:03:56
● 2026-07-27 14:41:20
●NSns2.ext.lighting.com2026-02-17 → 2026-07-27 · 3 obs
● 2026-02-17 00:03:56
● 2026-07-27 14:41:20
●NSns3.ext.lighting.com2026-02-17 → 2026-07-27 · 3 obs
● 2026-02-17 00:03:56
● 2026-07-27 14:41:20
○A192.31.41.982015-08-29 → 2016-12-14 · 4 obs
● 2016-12-14 06:18:50
○ 2026-02-17 00:03:56
○ 2026-07-27 14:41:20
●A54.74.135.1342026-02-17 → 2026-07-27 · 3 obs
● 2026-02-17 00:03:56
● 2026-07-27 14:41:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | j.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net, f.gtld-servers.net... | - |
| classr.com | ns1.ext.lighting.com, ns2.ext.lighting.com, ns3.ext.lighting.com | 6 records |
✅ Authoritative Response
Server:57.67.40.21
NS records: ns1.ext.lighting.com, ns2.ext.lighting.com, ns3.ext.lighting.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for classr.com (unsigned zone)
⏱️ Timing
Total: 414ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 54.74.135.134 |
| NS | 3 | ns2.ext.lighting.com, ns1.ext.lighting.com... |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns1.ext.lighting.com ddi-authority.signi |
📌 Glue Records Collected
Total: 6
Out-of-bailiwick: 6 (ns1.ext.lighting.com, ns1.ext.lighting.com, ns2.ext.lighting.com...)
Analysis
IP Addresses
classr.com directs to one IP number, which is 54.74.135.134.
Among the host names that share IP numbers with classr.com are led-drivers.com, www.canlyte.com, halolighting.com and two others.
Name Servers
classr.com is served by three name servers: ns1.ext.lighting.com, ns2.ext.lighting.com and ns3.ext.lighting.com.
There is at least partial name server overlap between classr.com and other domains — lighting.philips.com.cn, meethue.ca, strandlight.com and two more among them.
The name servers ns1.ext.philips.com, ns2.ext.philips.com and ns3.ext.philips.com are often found in combination with these name servers.
The hostnames ns1.ext.lighting.com, ns2.ext.lighting.com and ns3.ext.lighting.com each direct to two IP addresses — ns1.ext.lighting.com to 57.67.40.21 and 2a01:ce89:8001:0:57:67:40:21, ns2.ext.lighting.com to 57.77.21.77 and 2a01:ce95:4001:100:57:77:21:77, and ns3.ext.lighting.com to 57.73.36.69 and 2a01:ce9d:1:0:57:73:36:69.