theamericanprogrammer.com

TheAmericanProgrammer.com provides information about IBM mainframes and many others.

The American Programmer: (The mainframe boneyard) Programming books manuals and information for the mainframe, midrange, as/400, legacy systems, and the web

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Authority

59/100

Safety

90/100

Registered

May 23, 2003

23 years old · Above.com Pty Ltd.

4 of 5 safety checks passed (Sep 8, 2026).

AboutUs has not vetted this site. 1 of 5 automated safety check did not pass. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.

Current facts

What AboutUs observed on the live site and in WHOIS/DNS today. These are measurements, not an endorsement of the site.

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Domain registered May 23, 2003 — 23 years old.

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Registrar today: Above.com Pty Ltd. — unchanged since AboutUs began tracking (Sep 8, 2026).

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Live site responds over HTTPS.

Trust record

Authority & Safety, with the evidence

How this is scored →

Authority 59/100 — ahead of 59% of scored sitesClear

Why this authority score

Prominence (Open PageRank 3.2/10)+6
Verified continuity: 23.1 years (RDAP registration)+10
Security & email hygiene+3
Calibration adjustment (published map)+12

Every point maps to a sentence. These lines sum to the model score of 31/99, which is what places this site at 59/100 against every other scored site.

Safety evidence

Missing DMARC (mild)

Site history

Dated record — historical facts always carry their date.

2003
Domain registered (May 23, 2003).
2026
Checked today — 4 of 5 safety checks passed (Sep 8, 2026).

✓ domain continuity 23 years registered✓ live verified Sep 8, 2026

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