When visiting the website, it becomes immediately apparent that ZX2C4 is a personal portfolio showcasing the various projects developed by Jason A. Donenfeld. The title of the website is presented in a straightforward manner, along with the tagline "The portal for geek projects of Jason A. Donenfeld." The header also features links to the blog, contact page, and GitHub repository.
Based on the content present on ZX2C4, it is unlikely to pose any risks to family audiences. The website is focused on open-source software and technology, with no inappropriate content or language.
The presentation of the site is simple and minimalist, with a predominance of black, white, and shades of grey. The text is easy to read thanks to the choice of a sans-serif font and is complemented by high-quality graphics and icons. The layout itself is easy to navigate, with the main menu at the top of the page, followed by a brief summary of the currently featured projects.
In terms of site statistics, it is noteworthy that ZX2C4 receives a considerable amount of traffic for a personal portfolio, with 883 unique users per day and over 1800 pageviews. The site value is also high, at 32850 US dollars, reflecting the high quality of the work presented.
One aspect where ZX2C4 could improve is its PageSpeed Insights score, currently at 68. While this is not terrible, a higher score would result in a faster and smoother browsing experience for users. The site could benefit from optimization efforts such as compressing images, minifying code, and leveraging browser caching.
Overall, ZX2C4 is a well-designed and functional personal portfolio that showcases the diverse talents of Jason A. Donenfeld. It is easy to navigate and presents its content in a clear and concise manner. While there is always room for improvement, even the current version is a testament to the quality of the work presented.





| Domain | www.zx2c4.com |
| Issuer Organization | Let's Encrypt |
| Issuer | E5 |
| Algorithm | ecdsa-with-SHA384 |
| Valid form | 07/14/2024 |
| Expiration | 10/12/2024 |
| Signed | Certificate is not self signed |
| Additional Domains |
www.zx2c4.com zx2c4.com |
Alexa Rank shows how popular zx2c4.com is in comparison with other sites. The most popular site has Alexa Rank equals 1. If zx2c4.com has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to zx2c4.com and pageviews on zx2c4.com over the past 3 months.
ASN ID: 20473
ASN Title: AS-CHOOPA - Choopa, LLC, USLast Update: 05/04/2026
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
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# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
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ASNumber: 20473
ASName: AS-CHOOPA
ASHandle: AS20473
RegDate: 2001-05-10
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/20473
OrgName: Choopa, LLC
OrgId: CHOOP-1
Address: 14 Cliffwood Ave Suite 300
City: Matawan
StateProv: NJ
PostalCode: 07747
Country: US
RegDate: 2006-10-03
Updated: 2016-01-11
Comment: http://www.choopa.net/
Ref: https://rdap.arin.net/registry/entity/CHOOP-1
OrgAbuseHandle: ABUSE1143-ARIN
OrgAbuseName: Abuse Department
OrgAbusePhone: +1-973-849-0500
OrgAbuseEmail: abuse@choopa.com
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OrgTechHandle: NETWO1159-ARIN
OrgTechName: Network Operations
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OrgTechEmail: network@choopa.com
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OrgNOCHandle: NETWO1159-ARIN
OrgNOCName: Network Operations
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OrgNOCEmail: network@choopa.com
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RTechHandle: NETWO1159-ARIN
RTechName: Network Operations
RTechPhone: +1-973-849-0500
RTechEmail: network@choopa.com
RTechRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN
RNOCHandle: NETWO1159-ARIN
RNOCName: Network Operations
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RNOCEmail: network@choopa.com
RNOCRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN
RAbuseHandle: ABUSE1143-ARIN
RAbuseName: Abuse Department
RAbusePhone: +1-973-849-0500
RAbuseEmail: abuse@choopa.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE1143-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
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Domain Name: ZX2C4.COM
Registry Domain ID: 25366525_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.google.com
Registrar URL: http://domains.google.com
Updated Date: 2017-07-27T17:02:52Z
Creation Date: 2000-04-21T00:18:57Z
Registry Expiry Date: 2027-04-21T00:18:57Z
Registrar: Google LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: registrar-abuse@google.com
Registrar Abuse Contact Phone: +1.8772376466
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.ZX2C4.COM
Name Server: NS2.ZX2C4.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2022-04-19T22:31:51Z
| Host | A Record | TTL |
|---|---|---|
| zx2c4.com | 136.144.57.121 | 3600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| zx2c4.com | mxa.mailgun.org | 10 | 3600 |
| zx2c4.com | mxb.mailgun.org | 10 | 3600 |
| Host | NS Record | TTL |
|---|---|---|
| zx2c4.com | ns1.zx2c4.com | 3600 |
| zx2c4.com | ns2.zx2c4.com | 3600 |
| Host | TXT Record | TTL |
|---|---|---|
| zx2c4.com | v=spf1 a:mail.zx2c4.com include:_spf.kernel.org include:mailgun.org ~all | 3600 |
| zx2c4.com | google-site-verification=YpE7u8b4O44Oei3OX6NMuWcev6blXl13OZ0ik-HgSVw | 3600 |
ns1.zx2c4.com
TTL: 3600
Email address: jason.zx2c4.com
Serial: 2024070405
Refresh: 2000
Retry: 180
Expire: 1209600
Minimum: 3600
Last tested: 12/12/2015

| Total Resources | 15 |
| Number of Hosts | 5 |
| Static Resources | 9 |
| JavaScript Resources | 6 |
| CSS Resources | 1 |
Last tested: 06/03/2017


| Total Resources | 14 |
| Number of Hosts | 4 |
| Static Resources | 9 |
| JavaScript Resources | 5 |
| CSS Resources | 1 |