From Technologizer:

Here are Media Metrix’s top 15 Web properties (ie, networks of related sites) for April 1999. I’ve rounded the figures for unique visitors up to the nearest million.

1. AOL (46 million unique visitors): Mock AOL if you must. But in 2009 it’s still a biggie–the fourth largest Web property, with 104 million unique visitors.

2. Microsoft (32 million unique visitors): Still a giant in 2009–the number-three property with 122 million unique visitors.

3. Yahoo (31 million unique visitors): It may have seen more than its share of troubles in recent years, but in 2009, Yahoo is the second largest Web property, with 146 million unique visitors.

4. Lycos (29 million unique visitors): Sold multiple times in the last ten years and greatly downsized but still around in 2009, as part of a company called Daum; no longer in the top fifty Web properties.

5. Go Network (21 million unique visitors): Disney’s ill-fated attempt to build a Yahoo-like portal remains extant in name only. Disney Online, its successor, is the 26th largest Web property today, with 28 million unique visitors.

6. GeoCities (19 million unique visitors). Yahoo had agreed to buy GeoCities in January 1999, but didn’t take control until May. Today, it’s rolled up into Yahoo’s numbers. But some time this year, it’ll just go away.

7. The Excite Network (17 million unique visitors): Once-mighty Excite collapsed years ago, but its site remains in business as part of Mindspark, a minor outpost of the IAC empire. IAC controls the Ask Network, which is the sixth largest Web property with 73 million unique visitors.

8. Time Warner Online (13 million unique visitors): Not counting AOL, which it owns today, 2009’s Time Warner network is the 33rd largest Web property, with 25 million unique visitors.

9. Blue Mountain Arts (12 million unique visitors). This once-hot online greeting card site is still with us, now part of American Greetings, which isn’t a top-50 property.

10, AltaVista (11 million unique visitors): The original hot search engine is now a sad front end for Yahoo Search, and therefore presumably rolled up into Yahoo’s ComScore numbers.

11. Amazon.com (10 million unique visitors). Still doing fine–today, Amazon’s sites reach 61 million visitors, good for tenth place.

12. Xoom.com (9 million unique visitors): Back in April of 1999, Xoom was a mini-empire of Web services, including free hosting, clip-art downloads, and more. A month later, it partnered up with NBC to become part of that company’s online efforts. Then, in 2001, it went away. Today’s Xoom.com, a service for international money transfers, is related in name only.

13. Snap (9 million unique visitors): This site started out as CNet’s attempt to build a Yahoo-like portal, then became a joint venture with NBC. And then the name went away at the same time that Xoom did. The current Snap.com belongs to the unrelated Web site preview company.

14. Real Networks (8 million unique visitors): The online media company remains a top-50 Web property today–just barely–at #49, with 20 million unique visitors.

15. Cnet (8 million unique visitors): The network of tech sites remains a big player today; in May 2008, it became part of CBS Interactive. That property is #11 in Comscore’s numbers, with 54 million unique visitors.