GoGuides Trust Record
Enter a domain to view its GoGuides Website Trust Record, including measured trust signals, canonical website URL, observation history, current trust state, trust record fingerprint, and crawl timing.
Website Trust Record
nas.edu
Current Trust Summary
This GoGuides Trust Record summarizes the current measured state for nas.edu.
Trust Status
Public trust record
First recorded by GoGuides: 2026-01-08 23:53:08
First recorded by GoGuides: 2026-01-08 23:53:08
Public Eligibility
Eligible for public trust display.
Current Grade
A / AI Rank 83
Crawl Freshness
Fresh
Last crawled 11 hours ago
Last crawled 11 hours ago
Domain Provenance Record
8 measurements across 114 days
Stability Window
114 days
Trust Record
Public Trust Record for nas.edu.
Own this site? Copy this trust record code.
GOGUIDES
Public Trust Record
Rank: A • View Details
Canonical URL
https://nas.edu/
Matched URL
https://nas.edu/
AI Rank
83
Grade
A
Domain Provenance Timeline
Independent GoGuides observations showing when this domain was first recorded, how long it has been observed, and when its recorded state changed.
Observed Web & Network State
Objective state captured by GoGuides during its domain observation.
These fields describe what GoGuides observed and are separate from AI Rank or Grade.
HTTP Status
200
Observed Final URL
https://www.nationalacademies.org/
Observed Public IP Address
144.171.1.16
Observed Nameservers
a1-44.akam.net, a11-64.akam.net, a16-67.akam.net, a28-67.akam.net, a5-65.akam.net, a6-66.akam.net
Robots Access
Allowed
allowed
allowed
Page Robots Directive
Not observed
TLS Certificate
CN=DigiCert EV RSA CA G2,O=DigiCert Inc,C=US
Valid 2026-03-27 00:00:00 to 2026-10-11 23:59:59
Valid 2026-03-27 00:00:00 to 2026-10-11 23:59:59
Observed Provenance States
13 stored states across
13 observations
Observed State Changes
Content: 7
Robots: 0
DNS: 0
TLS certificate: 0
Final URL: 0
Robots: 0
DNS: 0
TLS certificate: 0
Final URL: 0
Observed Evidence Details
These are objective observations recorded by the GoGuides crawler.
They are separate from GoGuides AI Rank, Grade, or other interpretation.
Observation Type
Full Page Observation
Full Page Observation
Requested URL
https://nas.edu/
https://nas.edu/
Final URL
https://www.nationalacademies.org/
https://www.nationalacademies.org/
HTTP Status
200
200
Redirect Count
1
1
Content Type
text/html; charset=UTF-8
text/html; charset=UTF-8
Response Bytes
401,419
401,419
Canonical URL
Not observed
Not observed
Observed Page Title
National Academies of Sciences, Engineering, and Medicine
National Academies of Sciences, Engineering, and Medicine
Robots Access
Allowed
Allowed
Robots Reason
allowed
allowed
Meta Robots
Not observed
Not observed
X-Robots-Tag
Not observed
Not observed
Observed Public IP Address(es)
144.171.1.16
144.171.1.16
Observed Nameservers
a1-44.akam.net, a11-64.akam.net, a16-67.akam.net, a28-67.akam.net, a5-65.akam.net, a6-66.akam.net
a1-44.akam.net, a11-64.akam.net, a16-67.akam.net, a28-67.akam.net, a5-65.akam.net, a6-66.akam.net
TLS Certificate Issuer
CN=DigiCert EV RSA CA G2,O=DigiCert Inc,C=US
CN=DigiCert EV RSA CA G2,O=DigiCert Inc,C=US
TLS Valid From
2026-03-27 00:00:00
2026-03-27 00:00:00
TLS Valid Until
2026-10-11 23:59:59
2026-10-11 23:59:59
First Observed
2026-08-15 03:16:07
2026-08-15 03:16:07
Last Observed
2026-08-15 03:16:07
2026-08-15 03:16:07
Identical-State Observations
1
1
▶ Show Cryptographic Evidence & SHA-256 Hashes ▼ Cryptographic Evidence & SHA-256 Hashes
Title SHA-256
23d5d56cde259a8afb9a011eea503ef31f98c4f714d581d5b5d249d3b8eebf42
23d5d56cde259a8afb9a011eea503ef31f98c4f714d581d5b5d249d3b8eebf42
Content SHA-256
1b5a515f4e6f9162dc8a045cef1d8ab70156f6f29c9983c466ebd29c75eed8bc
1b5a515f4e6f9162dc8a045cef1d8ab70156f6f29c9983c466ebd29c75eed8bc
HTTP Body SHA-256
8f2b83197018522e5771bed0f3e9ef0d6513fae048f9bbb7b32b9eb6678eae0d
8f2b83197018522e5771bed0f3e9ef0d6513fae048f9bbb7b32b9eb6678eae0d
robots.txt SHA-256
d7de41195edb587acd2e4104cdfeccd015c38bc88d59c31af610f2aa4310e6a3
d7de41195edb587acd2e4104cdfeccd015c38bc88d59c31af610f2aa4310e6a3
DNS State SHA-256
9ea17f0c56bbd72aadddaa0370b3b3df7217c9f5f8ee1043a2c2092cae20757e
9ea17f0c56bbd72aadddaa0370b3b3df7217c9f5f8ee1043a2c2092cae20757e
TLS Certificate SHA-256
0dd64bc08f81a3903fbe1ff6cf8c0064dacf8d95e279c992768c82b68751caa5
0dd64bc08f81a3903fbe1ff6cf8c0064dacf8d95e279c992768c82b68751caa5
Complete Provenance State SHA-256
223dd2ed1f663f9546f5b1503e48ce22c64778581da059c91c16f81af6ce5256
223dd2ed1f663f9546f5b1503e48ce22c64778581da059c91c16f81af6ce5256
First Seen by GoGuides
2026-01-08 23:53:08
Last Crawled by GoGuides
2026-08-15 03:16:07 (11 hours ago)
Last Record Refresh
2026-08-15 03:17:16 (11 hours ago)
Record Refresh Freshness
Fresh
Last refreshed 11 hours ago
Last refreshed 11 hours ago
Stored Measurement Age
114 days
Trust Record Age
218 days ago
Stored Trust Measurements
8
Measurement Span
114 days across 8 stored measurements
Stability Window
114 days
Current Trust State Since
2026-04-23 00:27:24 (114 days ago)
Days Since Last Change
114 days
Rank/Algo State Changes
2
Trust Record Fingerprint (SHA-256)
9eb1deaeec87b85862076ee1767f34b45ec0af99c53ddb9e8b25c542dfc952e8
Computed from: matched URL + rank + last crawled + algorithm version. This identifies the GoGuides trust record state; it is not domain-owner verification.
Provenance Observation History
This timeline shows when GoGuides recorded this trust state, including rank, crawl timing, algorithm version, and verification fingerprint.
2026-08-15 03:17:16 | rank 83 | crawled 2026-08-15 03:16:07 | v19eb1deaeec87b85862076ee1767f34b45ec0af99c53ddb9e8b25c542dfc952e8
2026-08-15 03:15:39 | rank 83 | crawled 2026-08-14 23:34:43 | v1
5a726ac6b6a3c16690a2610debe4b9ce4ccd479d55b300a44408cf97737fabf0
2026-05-06 18:09:55 | rank 79 | crawled 2026-05-06 12:28:03 | v1
1054313f2536b99e3e5a70f9c3c1fe22a189b7d364884eba9922de726c483e60
2026-05-06 10:59:37 | rank 81 | crawled 2026-04-30 00:28:05 | v1
0b71b71f55227268c44c8e072be1fa1f8856359ccd7dc45b5bc66b871c7616f4
2026-04-29 18:03:43 | rank 81 | crawled 2026-04-29 12:28:04 | v1
bf414b7271f0679cd3b477db785e2209b491f320c66a60203e4ddf05d82a7722
2026-04-29 11:05:29 | rank 81 | crawled 2026-04-29 00:28:04 | v1
e54a5c66812b263e92f58250ddde112464e7d16296d1f919744f4500fe940e75
2026-04-23 17:12:12 | rank 79 | crawled 2026-04-23 00:28:09 | v1
8b0f04c204c242ea0a0b59f19b6e39d3e2d347455f50b11c9d5463d4a2eb64ff
2026-04-23 00:27:24 | rank 83 | crawled 2026-03-21 03:01:26 | v1
7ee689f137efd6a8a0afb7ca8fc2c24fd966f600401f78d3d0364d3d2b4431e2
Trust Favicon Previews
These favicons are generated directly from GoGuides trust measurements for the site. They are not decorative — the design is derived from the same data used to evaluate the domain (AI Rank and crawl timing). Because the favicon is generated from these measurements, the same inputs always produce the same trust favicon. Each favicon is therefore unique to the website it represents. If the favicon ever appears different elsewhere, verify the record here to confirm the current measured state.
Related GoGuides AI Visibility & Trust Utilities
These GoGuides utilities work together: explain crawler activity, inspect AI visibility gaps, compare robots.txt with trust-layer signals, check verified text records, and activate a public Trust Signal when a domain is ready.