The dotcom domain name celebrates its 25th birthday today. Computer maker Symbolics registered 'symbolics.com' on 15 March 1985 - the first of just seven dotcoms registered that year.

Symbolics declared bankruptcy in the early 90s but is still under operation with new owners. That means symbolics.com is the internet's oldest still-functioning dotcom domain.

It wasn't until 1997 that the millionth dotcom was registered, but now 668,000 dotcom sites registered every month, according to the BBC. According to the OECD, 21 million domain names were registered between 1985 and 2000. A further 57 million were registered between 2000 and 2010.

So, on the 25th anniversary of the dotcom, we thought we'd take a look back at the internet's oldest commercial websites.

1. symbolics.com: March 15, 1985

2. bbn.com: April 24, 1985

3. think.com: May 24, 1985

4. mcc.com: July 11, 1985

5. dec.com: September 30, 1985

6. northrop.com: November 7, 1985

7. xerox.com: January 9, 1986

8. sri.com: January 17, 1986

9. hp.com: March 3, 1986

10. bellcore.com: March 5, 1986

11. ibm.com: March 19, 1986

12. sun.com: March 19, 1986

13. intel.com: March 25, 1986

14. ti.com: March 25, 1986

15. att.com: April 25, 1986

16. gmr.com: May 8, 1986

17. tek.com: May 8, 1986

18. fmc.com: July 10, 1986

19. ub.com: July 10, 1986

20. bell-atl.com: August 5, 1986

21. ge.com: August 5, 1986

22. grebyn.com: August 5, 1986

23. isc.com: August 5, 1986

24. nsc.com: August 5, 1986

25. stargate.com: August 5, 1986

26. boeing.com: September 2, 1986

27. itcorp.com: September 18, 1986

28. siemens.com: September 29, 1986

29. pyramid.com: October 18, 1986

30. alphacdc.com: October 27, 1986

31. bdm.com: October 27, 1986

32. fluke.com: October 27, 1986

33. inmet.com: October 27, 1986

34. kesmai.com: October 27, 1986

35. mentor.com: October 27, 1986

36. nec.com: October 27, 1986

37. ray.com: October 27, 1986

38. rosemount.com: October 27, 1986

39. vortex.com: October 27, 1986

40. alcoa.com: November 5, 1986

41. gte.com: November 5, 1986

42. adobe.com: November 17, 1986

43. amd.com: November 17, 1986

44. das.com: November 17, 1986

45. data-io.com: November 17, 1986

46. octopus.com: November 17, 1986

47. portal.com: November 17, 1986

48. teltone.com: November 17, 1986

49. 3com.com: December 11, 1986

50. amdahl.com: December 11, 1986

51. ccur.com: December 11, 1986

52. ci.com: December 11, 1986

53. convergent.com: December 11, 1986

54. dg.com: December 11, 1986

55. peregrine.com: December 11, 1986

56. quad.com: December 11, 1986

57. sq.com: December 11, 1986

58. tandy.com: December 11, 1986

59. tti.com: December 11, 1986

60. unisys.com: December 11, 1986

61. cgi.com: January 19, 1987

62. cts.com: January 19, 1987

63. spdcc.com: January 19, 1987

64. apple.com: February 19, 1987

65. nma.com: March 4, 1987

66. prime.com: March 4, 1987

67. philips.com: April 4, 1987

68. datacube.com: April 23, 1987

69. kai.com: April 23, 1987

70. tic.com: April 23, 1987

71. vine.com: April 23, 1987

72. ncr.com: April 30, 1987

73. cisco.com: May 14, 1987

74. rdl.com: May 14, 1987

75. slb.com: May 20, 1987

76. parcplace.com: May 27, 1987

77. utc.com: May 27, 1987

78. ide.com: June 26, 1987

79. trw.com: July 9, 1987

80. unipress.com: July 13, 1987

81. dupont.com: July 27, 1987

82. lockheed.com: July 27, 1987

83. rosetta.com: July 28, 1987

84. toad.com: August 18, 1987

85. quick.com: August 31, 1987

86. allied.com: September 3, 1987

87. dsc.com: September 3, 1987

88. sco.com: September 3, 1987

89. gene.com: September 22, 1987

90. kccs.com: September 22, 1987

91. spectra.com: September 22, 1987

92. wlk.com: September 22, 1987

93. mentat.com: September 30, 1987

94. wyse.com: October 14, 1987

95. cfg.com: November 2, 1987

96. marble.com: November 9, 1987

97. cayman.com: November 16, 1987

98. entity.com: November 16, 1987

99. ksr.com: November 24, 1987

100. nynexst.com: November 30, 1987

(Domain record data provided by iWhoIs.com)