zperiod.app
No paid content found
Multilingual
Categories: Resources & Utilities
Zperiod is a complete interactive periodic table with 118 elements, 3D atom models, ions, chemistry tools, and worksheet practice for modern chemistry learning.
Visit website
Updated: 2026-10-04 21:33
Language: English (default)
Access: Normal
Profile views 0
Outbound visits 0
Related questions
More questions →What is zperiod.app?
Does zperiod.app offer paid content?
What languages does zperiod.app support?
How can I visit zperiod.app?
What are some alternatives to zperiod.app?
Website Overview
An active inbound-mail setup with incomplete authentication may leave the domain more open to impersonation. Provider hosting alone does not close that gap.
Domain and Registration
The domain was registered less than a year ago and has limited historical evidence to assess. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .app extension, which is not an independent safety signal.
DNS and Email
The observed email authentication setup is incomplete: DMARC is missing. Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the titan.email email service. No CNAME was found; the observed records resolve directly to addresses. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.
TLS and Certificates
The public key uses EC with 256 bits. 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 by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.
HTTP and Browser Security
The response lacks these common security headers: CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, clickjacking protection. CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray, x-cache, x-served-by, via response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers.
Technology Stack Analysis
The public page identifies Cloudflare, Fastly without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
The title has 66 characters and may be truncated in search results. Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity. The page declares 41 language or regional alternatives using hreflang. A meta description is present, with 160 characters.
Hosting and Email
Cloudflare
Hosting
Fastly
Location
Location unknown
104.21.37.137
Pages, Search and Sharing
| Meta description | Zperiod is a complete interactive periodic table with 118 elements, 3D atom models, ions, chemistry tools, and worksheet practice for modern chemistry learning. |
|---|---|
| Canonical URL | https://zperiod.app/ |
| Language | English (default) · Multilingual |
| Twitter Card | summary_large_image |
Social Sharing Preview
15 fields
Sharing metadata
| og:url | https://zperiod.app/ |
|---|---|
| og:type | website |
| og:image | https://zperiod.app/images/preview-modal.png |
| og:title | Zperiod: Interactive Periodic Table (118 Elements, 3D Atom Models) |
| og:locale | en_US |
| og:image:alt | Zperiod interactive periodic table showing a 3D atom model |
| og:site_name | Zperiod |
| og:description | Explore all 118 elements with an interactive periodic table, 3D atom models, ions, chemistry tools, and worksheet practice. |
| og:image:width | 1200 |
| og:image:height | 630 |
| twitter:card | summary_large_image |
| twitter:image | https://zperiod.app/images/preview-modal.png |
| twitter:title | Zperiod: Interactive Periodic Table (118 Elements, 3D Atom Models) |
| twitter:image:alt | Zperiod interactive periodic table showing a 3D atom model |
| twitter:description | Explore all 118 elements with interactive chemistry visuals, 3D atom models, ions, and classroom-ready tools. |
robots.txt (opens in a new tab)
3 rulesAll bots 1 allowed · 2 disallowed
All bots
/
/images/copy1.png/images/copy2.png
No matching rules.
Sitemaps
2
Registration details RDAP / WHOIS
| Registrar | Name.com, Inc. |
|---|---|
| Registered | 2026-02-07 |
| Expires | 2027-02-07 |
| Domain status | client transfer prohibited |
| Nameservers | harlee.ns.cloudflare.com、kyree.ns.cloudflare.com |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | zperiod.app | 104.21.37.137 | 300 | — |
| A | zperiod.app | 172.67.208.198 | 300 | — |
| AAAA | zperiod.app | 2606:4700:3030::ac43:d0c6 | 300 | — |
| AAAA | zperiod.app | 2606:4700:3035::6815:2589 | 300 | — |
| MX | zperiod.app | mx1.titan.email | 300 | 10 |
| MX | zperiod.app | mx2.titan.email | 300 | 20 |
| NS | zperiod.app | harlee.ns.cloudflare.com | 86400 | — |
| NS | zperiod.app | kyree.ns.cloudflare.com | 86400 | — |
| TXT | zperiod.app | google-site-verification=JA-3D-R2Etj4l-6zSLj8EMBhktk-UOCnEnvWffdJcn8 | 300 | — |
| TXT | zperiod.app | v=spf1 include:spf.titan.email ~all | 300 | — |
TLS and certificates
| Assessment | Normal configuration |
|---|---|
| Supported protocols | TLSv1.2、TLSv1.3 |
| Negotiated protocol | TLSv1.3 |
| Certificate subject | zperiod.app |
| Issuer | Let's Encrypt |
| Valid until | 2026-11-27T07:51 · Remaining when checked: 53 days |
| Verification details | Certificate trust: Passed · Hostname match: Passed |
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| cache-control | max-age=600 |
| server | cloudflare |
| strict-transport-security | max-age=31556952 |
| access-control-allow-origin | * |
Identified technologies
User reviews (0)