chegg.us - robtex.com
chegg.us
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-201.awsdns-25.com ⭐ | ||||||
| A | 2600:9000:5300:c900::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-201.awsdns-25.com | ||||||
| A | 205.251.192.201🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-201.awsdns-25.com | ||||||
| NS | ns-1045.awsdns-02.org | ||||||
| A | 2600:9000:5304:1500::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1045.awsdns-02.org | ||||||
| A | 205.251.196.21🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1045.awsdns-02.org | ||||||
| NS | ns-1721.awsdns-23.co.uk | ||||||
| A | 2600:9000:5306:b900::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1721.awsdns-23.co.uk | ||||||
| A | 205.251.198.185🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1721.awsdns-23.co.uk | ||||||
| NS | ns-554.awsdns-05.net | ||||||
| A | 2600:9000:5302:2a00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront | ||||||
| PTR | ns-554.awsdns-05.net | ||||||
| A | 205.251.194.42🇺🇸 Amazon205.251.194.0/24 prefix | ||||||
| PTR | ns-554.awsdns-05.net | ||||||
| MX | mail.chegg.com ⭐ | ||||||
| SOA | ns-201.awsdns-25.comawsdns-hostmaster@amazon.com serial=1 | ||||||
us
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.cctld.us ⭐ | ||||||
| NS | b.cctld.us | ||||||
| NS | f.cctld.us | ||||||
| NS | k.cctld.us | ||||||
| NS | m.cctld.us | ||||||
| NS | n.cctld.us | ||||||
| NS | w.cctld.us | ||||||
| NS | x.cctld.us | ||||||
| NS | y.cctld.us | ||||||
| SOA | a.cctld.usadmin@tldns.godaddy serial=1773555288 | ||||||
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
●NSns-1045.awsdns-02.org2016-04-22 → 2026-03-22 · 3 obs
● 2016-04-22 06:48:38
● 2026-03-22 23:50:44
●NSns-1721.awsdns-23.co.uk2016-04-22 → 2026-03-22 · 3 obs
● 2016-04-22 06:48:38
● 2026-03-22 23:50:44
●NSns-201.awsdns-25.com2016-04-22 → 2026-03-22 · 3 obs
● 2016-04-22 06:48:38
● 2026-03-22 23:50:44
●NSns-554.awsdns-05.net2016-04-22 → 2026-03-22 · 3 obs
● 2016-04-22 06:48:38
● 2026-03-22 23:50:44
○NSudns1.ultradns.net2015-07-02 → 2016-02-02 · 4 obs
● 2016-02-02 17:43:02
○ 2016-04-22 06:48:38
○ 2026-03-22 23:50:44
○NSudns2.ultradns.net2015-07-02 → 2016-02-02 · 4 obs
● 2016-02-02 17:43:02
○ 2016-04-22 06:48:38
○ 2026-03-22 23:50:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| us | y.cctld.us, b.cctld.us, f.cctld.us, x.cctld.us... | - |
| chegg.us | ns-1721.awsdns-23.co.uk, ns-1045.awsdns-02.org, ns-201.awsdns-25.com, ns-554.awsdns-05.net | - |
✅ Authoritative Response
Server:205.251.194.42
NS records: ns-1721.awsdns-23.co.uk, ns-1045.awsdns-02.org, ns-201.awsdns-25.com, ns-554.awsdns-05.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for chegg.us (unsigned zone)
⏱️ Timing
Total: 975ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-1045.awsdns-02.org, ns-1721.awsdns-23.co.uk... |
| MX | 1 | mail.chegg.com (pri: 5) |
| SOA | 1 | ns-201.awsdns-25.com awsdns-hostmaster.a |
Analysis
Name Servers
chegg.us is delegated to four name servers: ns-201.awsdns-25.com, ns-554.awsdns-05.net, ns-1045.awsdns-02.org and ns-1721.awsdns-23.co.uk.
chegg.us at least partially shares name servers with other domains such as usapaymentexchange.com, mizuguchi.info, e76.fr, dbsgth1boo4g5.cloudfront.net and cancerguard.io.
Host names with two IP numbers:
ns-201.awsdns-25.com points to 2600:9000:5300:c900::1 and 205.251.192.201
ns-554.awsdns-05.net points to 2600:9000:5302:2a00::1 and 205.251.194.42
ns-1045.awsdns-02.org points to 2600:9000:5304:1500::1 and 205.251.196.21
ns-1721.awsdns-23.co.uk points to 2600:9000:5306:b900::1 and 205.251.198.185
Mail Servers
chegg.us is handled by a single mail server, mail.chegg.com.
The mail server setup for chegg.us matches that of other domains, for instance flashcardspl.us.