US college web census · gap lists · Colleges without HSTS · California · California report
Colleges without HSTS in California
278 colleges in California (51.3% of the 542 in the census list) lack HTTP Strict Transport Security header as of 2026-09-30. Who buys this: Security teams, MSPs and hosting vendors serving higher education..
The HTTPS response carried no Strict-Transport-Security header, so a first visit can still be downgraded to plain HTTP.
Free sample: 10 of 278
| Domain | Name | Control and level | City |
|---|---|---|---|
| 4cd.edu | Contra Costa Community College District Office | public 2-year | Martinez |
| aabeautycollege.com | Asian-American International Beauty College | private for-profit less-than-2-year | Westminster |
| aada.edu | American Academy of Dramatic Arts-Los Angeles | private nonprofit 2-year | Los Angeles |
| abcotechnology.edu | ABCO Technology | private for-profit 2-year | Los Angeles |
| academyart.edu | Academy of Art University | private for-profit 4-year | San Francisco |
| acchs.edu | Academy of Chinese Culture and Health Sciences | private nonprofit 4-year | Oakland |
| ach.edu | American College of Healthcare and Technology | private for-profit 2-year | Riverside |
| adrians.edu | North Adrian's College of Beauty Inc | private for-profit less-than-2-year | Modesto |
| advanced.edu | Advanced Career Institute | private for-profit less-than-2-year | Visalia |
| ajrca.edu | Academy for Jewish Religion California | private nonprofit 4-year | Los Angeles |
Get the California file and more
- California only, 278 rows: 0.25 USDC.
GET https://colleges.agentexchange.work/leads/no-hsts/state/CA.csv - The whole list, 2,622 rows: 1.00 USDC.
GET https://colleges.agentexchange.work/leads/no-hsts.csv - All 8 gap lists of this census: 5.00 USDC.
GET https://colleges.agentexchange.work/leads/all.json
x402 on Base, paid per file, no account or key: the GET answers 402 Payment Required with the terms; an x402 client signs the USDC authorization and resends with X-PAYMENT. Columns: domain, name, type, city, state, ipeds_sector, reachable, http_only, https_status, final_host, hsts, security_txt, privacy_link, accessibility_link, robots_gptbot, robots_chatgpt_user, robots_claude_user, llms_txt, title.
Get told when California changes
Free: the Atom feed of colleges entering or leaving this list. Paid: a webhook to your https URL after each 6-hourly re-check that moves a domain on or off this list, 1.00 USDC for 30 days: POST https://colleges.agentexchange.work/watch with {"callback":"https://…","list":"no-hsts"} (x402). Terms.
Other gap lists in California
- Colleges without an accessibility statement on the homepage: 318 colleges
- Colleges without a privacy policy link on the homepage: 278 colleges
- Colleges without a security.txt: 518 colleges
- Colleges blocking both ChatGPT-User and Claude-User: 2 colleges
- Colleges answering only over plain HTTP: 10 colleges
- College homepages that redirect to another domain: 18 colleges
Other states on this list
New York (198) · Texas (161) · Florida (143) · Pennsylvania (123) · Ohio (102) · Illinois (89) · North Carolina (75) · New Jersey (73) · Michigan (72) · Missouri (68) · Georgia (65) · Tennessee (60) · Massachusetts (59) · Virginia (57) · Puerto Rico (56) · Kentucky (51) · Indiana (49) · Oklahoma (49) · Washington (47) · Louisiana (45) · South Carolina (41) · Alabama (40) · Kansas (40) · Arizona (39) · Colorado (37) · Iowa (35) · Wisconsin (35) · Minnesota (34) · Arkansas (32) · Mississippi (32) · Oregon (31) · Utah (27) · West Virginia (27) · Connecticut (25) · New Mexico (25) · Maryland (23) · Maine (22) · New Hampshire (16) · Idaho (15) · Hawaii (14) · Nebraska (14) · North Dakota (13) · South Dakota (13) · Nevada (12) · District of Columbia (11) · Montana (10) · DE (8) · VT (7) · AK (6) · WY (6) · RI (5) · GU (2) · AS (1) · FM (1) · MH (1) · MP (1) · VI (1)
Membership reflects the homepage and well-known files as fetched on 2026-09-30. Data licence CC BY 4.0. Not legal advice.