Infrastructure - https://curbed.com BeaverCheck Audit

B

DNS Records

4 A records, 24 ms lookup

REVIEW

4 A records, 24 ms lookup

Resolves to 4 IPv4 address(es)

Got: 151.101.65.91, 151.101.129.91, 151.101.1.91, 151.101.193.91

No IPv6 (AAAA) records

CNAME record at zone apex

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Got: n.sni.global.fastly.net

No NS records found

No MX records — email not configured via DNS

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

No SPF record found in TXT records

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

DNS resolution time: 24 ms

Got: 24 ms

A	151.101.65.91, 151.101.129.91, 151.101.1.91, 151.101.193.91
AAAA	—
CNAME	n.sni.global.fastly.net
NS	—
MX	—
TXT	—
CAA	Lookup not available with standard resolver

Resolved in 24 ms

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

C

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B

TLS Certificate Expiry & Recommendations

69 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

69

days left

0d 30d 60d 90d+

Recommended actions

Add includeSubDomains to the HSTS directive
Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
Enable DNSSEC on your domain for DNS spoofing protection
Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy

A+

Redirect Chain

No redirects — direct access

PASS

No redirects — direct access

Got: https://www.curbed.com

https://www.curbed.com

6 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://www.curbed.com	200	6 ms	HTTP/1.1

A+

Crawlability

robots.txt present, sitemap with 20 URLs

PASS

robots.txt present, sitemap with 20 URLs

robots.txt is present

Got: 942 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 20 entries

Sitemap index with 20 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 942 B Sitemaps referenced 2 User-agents Claude-Web, Diffbot, ImagesiftBot, Mediapartners-Google*, PerplexityBot, Amazonbot, Applebot-Extended, Applebot, YouBot, *, CCBot, Omgilibot, Omgili, Twitterbot, Bytespider, ChatGPT-User, FacebookBot, Google-Extended, anthropic-ai, ClaudeBot Blocking No — crawling allowed

Sitemap: https://www.curbed.com/sitemap.xml
Sitemap: https://www.curbed.com/_news.xml

User-agent: Mediapartners-Google*
Disallow:

User-agent: Twitterbot
Disallow: /amp/*

User-agent: *
Disallow: /contactus/
Disallow: /search.html
Disallow: /search/
Disallow: *?origSession=*

User-Agent: PerplexityBot
Disallow: /

User-agent: Google-Extended
Disallow:

User-agent: Amazonbot 
Allow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Applebot
Allow: /

User-agent: anthropic-ai 
Disallow: /

User-agent: Bytespider  
Disallow: /

User-agent: CCBot 
Disallow: /

User-agent: ChatGPT-User  
Disallow: /

User-agent: ClaudeBot  
Disallow: /

User-agent: Claude-Web  
Disallow: /

User-agent: Diffbot  
Disallow: /

User-agent: FacebookBot 
Disallow: /

User-agent: ImagesiftBot  
Disallow: /

User-agent: Omgilibot  
Disallow: /

User-agent: Omgili 
Disallow: /

User-agent: PerplexityBot  
Disallow: /

User-agent: YouBot
Disallow: /

sitemap.xml 200 OK

Type Sitemap Index URLs 20 entries Valid XML Yes

Child Sitemaps:

A+

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.curbed.com/

https://curbed.com/

HTTP → HTTPS

301http://www.curbed.com/ → https://www.curbed.com/

Consistent

A+

Domain Intelligence

curbed.com — via Amazon Registrar, Inc., 24 years, 4 months old, hosted on Fastly

PASS

curbed.com — via Amazon Registrar, Inc., 24 years, 4 months old, hosted on Fastly

Domain registered until Apr 10, 2027 (11 months remaining)

DNSSEC is not enabled

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Registrar: Amazon Registrar, Inc.

Registrar lock is NOT enabled

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Hosting: Fastly

Got: AS54113

Domain expiry

300 days

April 10, 2027

SSL certificate

69 days

Issued by Let's Encrypt

Domain age

24 years, 4 months

Registered April 10, 2002

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.129.91

Registrar

Amazon Registrar, Inc.

Unlocked 4 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Enable DNSSEC to protect visitors from DNS spoofing
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar Amazon Registrar, Inc.

Created April 10, 2002 (24 years, 4 months ago)

Expires April 10, 2027 (11 months)

Last Updated March 6, 2026

Name Servers ns-1360.awsdns-42.org, ns-1818.awsdns-35.co.uk, ns-199.awsdns-24.com, ns-812.awsdns-37.net

DNSSEC Not enabled

Hosting

IP Address 151.101.129.91

ASN AS54113 (FASTLY - Fastly, Inc., US)

Provider Fastly

Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+

HTTP Probe Timing

Total 167 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

64 ms

TCP Connect

0 ms

TLS Handshake

2 ms

Time to First Byte

162 ms

Total Time

167 ms

Connection waterfall

DNS Lookup 64 ms TCP Connect 0 ms TLS Handshake 2 ms Server Processing 95 ms Content Transfer 5 ms

A+

CDN & Delivery

Fastly (HIT, MISS)

PASS

Fastly (HIT, MISS)

Site is served via Fastly CDN

Got: x-served-by: cache-iad-kcgs7200159-IAD, cache-toj-leto2350044-TOJ

CDN cache status: HIT, MISS

CDN Detected: Fastly

Provider Fastly Cache Status HIT, MISS Evidence x-served-by: cache-iad-kcgs7200159-IAD, cache-toj-leto2350044-TOJ