简体中文free-clep-prep.com
A free resource for CLEP and DSST exam preparation.
At a glance
- Category
- Other
- Language
- English
- Paid-content signal
- No paid content foundObserved
- Registered
- 2009
- Hosting
- Amazon.com, Inc.Inferred
- HTTPS certificate trusted
- PassedObserved
- Last updated
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Website Overview
An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Page metadata, canonical configuration and social previews work together to provide more consistent search and sharing presentation.
Domain and Registration
Registered in 2009, this domain has about 17 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .com extension, which is not an independent safety signal.
DNS and Email
The observed email authentication setup is incomplete: SPF is missing. The lowest TTL is 60 seconds, supporting rapid record changes at the cost of more frequent lookups. Nameservers are provided by Amazon Route 53, indicating managed DNS hosting. MX records point to the Google Workspace email service. No CNAME was found; the observed records resolve directly to addresses.
TLS and Certificates
The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued within the Amazon cloud or CDN ecosystem. The certificate is valid for about 197 days in total, with 175 days remaining.
HTTP and Browser Security
X-Powered-By exposes backend information: Express. The checked browser-security headers were not detected, leaving fewer explicit browser-side safeguards. No obvious internal addresses or debug information were found in the headers. No explicit CDN or WAF marker was found in the response headers. No CORS permission header was found, so browsers normally restrict cross-origin script access.
Technology Stack Analysis
The public page identifies Angular, Google Analytics, Express without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
Twitter Card metadata is configured. The title has 14 characters, within a common display range. A meta description is present, with 51 characters. The observed directives allow indexing and link following. No Generator meta tag is publicly exposed.
Hosting and Email
Amazon Route 53
Google Workspace
Ashburn, Virginia, United States
Inferred
3.210.225.99
Registration details
| Registrar | Amazon Registrar, Inc. |
|---|---|
| Registered | 2009-05-23 |
| Expires | 2027-05-23 |
| Domain status | client transfer prohibited |
| Nameservers | ns-1176.awsdns-19.org、ns-1585.awsdns-06.co.uk、ns-387.awsdns-48.com、ns-577.awsdns-08.net |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | free-clep-prep.com | 3.210.225.99 | 60 | — |
| A | free-clep-prep.com | 44.213.35.176 | 60 | — |
| MX | free-clep-prep.com | aspmx.l.google.com | 300 | 1 |
| MX | free-clep-prep.com | alt1.aspmx.l.google.com | 300 | 5 |
| MX | free-clep-prep.com | alt2.aspmx.l.google.com | 300 | 5 |
| MX | free-clep-prep.com | alt3.aspmx.l.google.com | 300 | 10 |
| MX | free-clep-prep.com | alt4.aspmx.l.google.com | 300 | 10 |
| NS | free-clep-prep.com | ns-1176.awsdns-19.org | 172800 | — |
| NS | free-clep-prep.com | ns-1585.awsdns-06.co.uk | 172800 | — |
| NS | free-clep-prep.com | ns-387.awsdns-48.com | 172800 | — |
| NS | free-clep-prep.com | ns-577.awsdns-08.net | 172800 | — |
| DMARC | _dmarc.free-clep-prep.com | v=DMARC1; p=none; | 300 | — |
TLS and certificates
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| cache-control | no-cache |
Identified technologies
Pages, Search and Sharing
| Meta description | A free resource for CLEP and DSST exam preparation. |
|---|---|
| Canonical URL | https://free-clep-prep.com/home |
| Language | English (default) |
| Twitter Card | summary_large_image |
Social Sharing Preview
9 fields
robots.txt (opens in a new tab)
HTTP 200Unknown
Sitemaps
0No sitemaps found
User reviews (0)