Internet Atlas Gallery

Core AS Internet

Cooperative Assocation for Data Analysis (CAIDA)
San Diego Supercomputer Center (SDSC)
University of California, San Diego (UCSD)

URL: https://www.caida.org/projects/as-core/

This graph combines dimensions showing peering richness and geographic information, revealing the highly 'core-connected' nature of Autonomous Systems (ASes). Polar angles represent the longitude of the AS headquarters, enabling consideration of continental implications of AS richness.

Visualization Thumbnail

Analysis

Data
. . . Sources
. . . Specification
. . . Aggregation
. . . Filters

Visualization
. . . Techniques
. . . Key Mappings
. . . Tools

Evaluation
. . . Strengths
. . . Issues

Credits/Contact Info
. . . Authors
. . . Contact Info

Full-Size Visualization

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Additional Content

AS Numbers and NIC Handles

1 BBNPLANET
101 WASH-NSF-AS
104 COLORADO-AS
109 CISCOSYSTEMS
114 SESQUINET-AS
12 NYU-DOMAIN
1205 JKU-LAN-ASN-AS
1206 PSCNET-HS-AS
1221 AARNET-AS
1224 NCSA-AS
1225 CICNET3-AS
1227 SDSC-TEST1-AS
1237 KREONET
1239 SprintLink
1241 GR-AUTO-AS
1248 NOKIA-AS
1251 ANBR-AS
1257 SWIPNET-AS
1267 IUNET-AS
127 JPL-AS
1270 - 1275 UNIDO-AS
1280 CIX-AS1
1290 UKNET-AS
1300 - 1309 FRANCE-ASNBLOCK-AS
1342 NOKIA-DATA-AS
137 ITALY-AS
144 ATT-INTERNET
145 VBNS
1653 SUNET
1659 TANET-ASN1
1706 UNIV-ARIZ
174 NYSERNET-AS
1740 CERFNET
1741 FUNET
1746 DRANET-AS
1749 NASA-GSFC-AS
1754 DESY-HAMBURG
1755 EBONE-INTERNAL
1759 DATANET
1761 DPT-INFO-RES
1767 IHETSDATANET
177 MERIT-AS
1781 KAIST-NET1
1784 SPRINTLINK
1785 SPRINTLINK-NYSERNET3
1800 ICM-Atlantic
1804 ICMNET-6
1830 IACNET2
1833 UNINET
1835 DENET
1836 EUNET-CH-AS2
1840 UDLAP-NET
1849 PIPEX-AS
1850 SURIS
1853 AT-BONE
186 CUA-AS
1877 - 1901 ASNBLK-RIPE
188 SAIC-AS
1902 FESNET-L
1909 ALPHA-NAP-AS
1913 DLA4
1916 RNP-AS
1930 RCCNET
195 SDSC-AS
1955 HBONE
1968 UMASSP-DOM
1982 ASN-NWNEXUS
1984 BUMEDSIGONEL
1998 STATE-OF-MN
20 UR
2012 UNINET1
2015 MSEN-SYSTEM
2018 UNINET-ZA
2028 BNRUK-AS
2033 Panix
2041 CRL-GATE
2048 LANET-1
2055 LSU-1
2056 AOL-AS
209 WESTNET-EAST
2140 ISSC-AS
2149 PSINET-2
2150 CSUNET-SW
22 NOSC
226 LOS-NETTOS-AS
2277 ECUANET
234 NSFNETTEST11-AS
237 NSFNETTEST14-AS
2379 UNIT-TEL-FLA
2380 ESTNET
2381 WISCNET1-AS
24 AMES-NAS-GW
2493 FONOROLA-EAST
2529 DEMON-SYS
2547 BMENET-AS
2548 DIGEX-AS
2551 NETCOM-AS ]
2553 FSU-AS
2554 INTER-GRP-A
2561 FRCU-EUN
2563 KREN-GATEWAY
2568 CTSNET
2572 MORENET
2578 RELCOM-DEMOS
2585 - 2614 ASNBLK-RIPE
2635 CENTEL-NV
2637 GEORGIA-TECH
2683 RADIO-MSU
2697 ERNET-AS
2698 IASTATE-AS
270 PSCNI-AS
2707 WEC
271 BCNET-AS
2711 SUNBELT-AS
2715 REDERIO-AS
2764 CONNECT-NET
2766 GLASNET
2767 UNITEL_CBMS
2773 - 2822 ASN-BLKRIPE2
278 RAM-AS
2828 INTERNEX
284 UUNET-AS
286 EUNET-AS
288 ESA-AS
2895 FREE-NET-AS
2900 WN-AZ
2901 WN-NM
2905 TICSA-ASN
2907 SINET-AS
291 ESNET-EAST-AS
2914 LITTLE-GARDEN
2915 SPIN-NET
2917 OLEANE
2920 LACOE
293 ESNET-WEST-AS
2933 REALTIME
2939 SCAROLINA-AS
295 OSI-GW-AS
297 NSN-UMD-AS
303 NPRDC-AS
3058 EMNET
3064 CYBER-ASN
3082 ADVANTIS
3112 OARNET-AS-1
3132 RCP-AS
3136 STATE1-AS
32 STANFORD
3354 THENET-AS-1
3356 GLOBALNET
3384 NEW-YORK-NET
34 UDELNET
3403 TIAC
3404 COLORADOCOOP
3407 INTERPATH-NC
3447 CENTEL-CMDS
3450 UTK
3452 UAB-AS
3462 HINET-AS
3463 ACES-AS
3464 ASC-NET
3479 PEACHNET-AS1
3488 SPACENETJP
3491 CAIS-ASN
3493 INTERLINK
3505 VNET-GA
3549 IMPACT
3554 USIT-ASN
3557 VIX
3561 MCI-RESTON
3581 OBS-NET
3593 EPIX
3596 TELEAUM
3597 NET-RETINA
3602 INSINC
3608 NBNIC-NCA
3632 CONACYT
3669 IQUEST
3670 OPTIMUM-AS
3701 NERONET
3720 TIMS-AS
3728 ONR-ADDR
3734 SJEN
3737 PTD-AS
3739 NEWNET
3741 IS
3742 SEMAPHORE-1
3746 IPAC-WORLD
3749 TECNET
3751 SNET-AS
3758 SINGNET
376 RISQ-AS
3768 DIALOG-AS
378 ILAN-AS
3786 DACOMNET
3796 OUTERNET
3799 IDS
38 UIUC
3801 MISNET
3803 ULTRA-MA
3807 UMTNET-ASN
3814 IMS-INTERCOM
3816 SAITEL-CO
3817 FREESIDE-NET
3819 SIGNET
3831 FIBRNET-B1
3840 LABTAM
3845 STATE-NET
3847 IMN
3857 INC
3900 TEXASNET
3908 - 3912 WNBLK-AS
3914 DX-NET
3925 ICO-SV
3932 VOICENET
3951 ICONNET
3967 NETUSACOM-AS
3976 NURI-ASN
3996 FIRN
3999 PENN-STATE
4000 - 4005 GLOBAL-SPLK
4006 NETRAIL
4039 ALBANYNET
4058 LINKAGENET
41 AMES
4134 CHINALINK
4136 USCYBER
4141 ICA
4148 ACTCOM
4167 CONNECTSOFT-COM
4181 TDS-AS
4183 COMPUSERVE
4193 WA-STATE-GOV
4198 RADIXNET
4200 AGIS-NET
4222 LEN-NET
4223 CONNIX
4230 EMBRATEL-BR
4231 FASTNET-ASN
4262 - 4269 CERNET-ASN-BLOCK
4274 AU-NET
4276 INCH
4277 KIVEX
4310 LINET
4314 COMMNET-ASN
4323 TW-COMM
4327 SNA-NET
4358 XNET
4374 CONNECT
4432 CSTONE-NET
4433 ACCESS-ONE
4436 AS-SCRUZ-NET
4454 TNET-AS
4459 KDD-NET
4470 ASN-CITENET
4472 IONET
4493 UNI-SON
4494 INTERBYTES
4511 MIAMI-EDU
4513 TIG
4527 BRAINSTORM
4538 CERNET-BKB
4540 WELL
4544 CONXION-A
4550 AN-CMSPP
4565 HLC-INTERNET
4569 ASHTON-NET1
4591 SYRANET-GW
4740 WORLDS-SEA
48 NRL-AS
4908 CRC-ASN
4911 USW-INTERNET
4913 IWL
4923 MCIX
4926 TELINTAR
4927 ASN-SBCNET
4958 LDSNET
4967 STARTEL
4969 NETACCESS
4995 NETUP
4997 RMCI
4999 SPRINTIPDIAL
5000 IOS-NET
5002 BBSATLGA
5003 INSYNC
5006 MIXNET-NET
5024 BRIDGE
5050 PSC-EXT
5051 KOREAPC
5056 INS-NET-2
5071 WESTEL-1
5076 UNICOM
5081 WINTERLAN
5097 SOFTAWARE
5106 AADS-COLUMBUS
513 CERN-AS
517 XLINK-UKA
52 UCLA
5377 - 5631 RIPE-ASNBLOCK5
542 ARNET
549 ONET-AS
553 BELWUE-AS
559 SWITCH-AS
5641 ABS-NET
5645 JUMP-NET
5646 NN-CNSM
5650 ELIX
5656 ACCESSUS-DOM
5668 CENTURY
5669 U-NET
568 SUMNET-AS
5683 CWI-CORE
5687 AA-NET
5688 PASSPORT
5690 VIANET-NO
5691 MITRE-WASH
5696 GOODNET
5700 IV-NET
5705 SIRIUS
5710 GIA-ASN-1
5713 SAIX-NET
5714 EDS-WEB
5716 CYBERCOM
5727 WORLDNET-0
5737 USW-INTERACT2
5738 SOVER-ASN
5742 CCINET
5752 GREATBASIN
5765 INTERLOG
5769 VIDEOTRON
577 CA-NET-AS
5771 INET-AK
5778 SMATNET-TAC
6 HIS-MULTICS
600 OARNET-AS
603 CANET
6058 NWT-AS
6061 DLI-IBS
6062 NETPLEX
6064 INTERSYS-AS
6066 MFS-ASN
6067 OCTACON-AS
6076 ERINET
6079 EROLS
6081 AISNET
6082 MAI-NET
6089 INTERTECH-LTD
6091 NETA
6095 APK-NET
611 CANET11-AS
6113 GRIDNET
6127 IDSC-RITSEC
6136 NWRAINET
6138 CIOE
6140 IMPSAT-AR
6144 SOUND-ADVICE-LTD
6147 UNIRED
6172 HOME-NET-1
6181 FUSE-NET
6197 BATI-ATL
6203 ISDN-NET
6221 USCYBERSITES
6223 USW-INTERACT3
6225 USW-INTERACT6
6226 USW-INTERACT5
6227 USW-INTERACT4
6241 IGS-GATE
6249 ULTRA-RI
6255 CHANNEL1
6259 ASN-FIBERNET
6261 VISINET
6263 NDIN
6299 TELALINK
6302 PHOENIX
6304 IWAY-ASN1
6308 ALASCOM-MIS
6320 VBC-WEST
6325 ISBENET
6327 SHAWFIBER
6332 TELNOR
6335 NTRNET
6337 HIWAAY
6347 DIAMOND
6350 BAWAVEDC
6354 LYCOS
6356 NERDCNET
6360 UNIVHAWAII
6364 ATLANTIC-NET
6365 I1
6371 AMERICATEL
6373 OPUS1
6391 SPACELAB
6395 DPNET-INTERNET
6401 ECONNECT-ASN
6402 ONECALL
6407 ICAN-ASN
6412 KW
6413 SOCOMM
6423 EASYSTREET-ONLINE
6427 LIGHTNING
6429 RDC-INTERNET
6453 TELEGLOBE-AS
6459 I-2000
6461 ABOVENET
6463 RNS-BIS1
6467 ACSI
6629 NOAA-AS
6630 LOA
668 ASN-ASNET-NET-AS
676 ARNET-AS
679 TUNET-AS
681 KAWAIHIKO-1
684 MBNET-AS
690 NSFNET-T3-RT-AS
701 - 705 ALTERNET-AS
71 HP-INTERNET-AS
715 APPLE-CORPORATE-AS
719 LANLINK-AS
747 TAEGU-AS
760 UNIVIE-AS
762 WELLFLEET-AS
766 IRIS-AS
786 JANET
789 IN2P3-LYON-AS
790 FUUG-NET-AS-AS
803 SASK-NET-AS
81 CONCERT
813 UUNETCA-AS1
814 UUNETCA-AS2
815 UUNETCA-AS3
816 UUNETCA-AS4
856 NBIX4

Internet Atlas Gallery

Core AS Internet

Cooperative Assocation for Data Analysis (CAIDA)
San Diego Supercomputer Center (SDSC)
University of California, San Diego (UCSD)

URL: https://www.caida.org/projects/as-core/

Visualization Thumbnail

Credits / Contact Info

Authors:

CAIDA staff

Brad Huffaker
Andre Broido
kc claffy
Marina Fomenkov
Sean McCreary
David Moore
Oliver Jakubiec

Contact Info:
For further information, send email to:
info @ caida.org

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Internet Atlas Gallery

Core AS Internet Data

Cooperative Assocation for Data Analysis (CAIDA)
San Diego Supercomputer Center (SDSC)
University of California, San Diego (UCSD)

URL: https://www.caida.org/projects/as-core/

Visualization Thumbnail

About the Data

Data Sources:
(Source1): Bill Cheswick, 14 January 2000 http://www.cheswick.com/ches/map/gallery/index.html
(Source2): traceroutes from CAIDA network to Cheswick destinations, 15-22 January 2000
(Source3): 14 skitter data monitors on 8,16,24 January 2000

Data Specification:
(Data1): 220,533 IP addresses (nodes) (220,533 nodes, 374,013 links, and 154,104 target destination IP addresses.)
(Data2): BGP Routing Table of 16 Jan 2000, from the Oregon Route Views Project containing 75,643 total prefixes.

Data Aggregation:
(Aggregate1): IP addresses in 32,798 BGP prefixes were mapped to their best-match origin AS in the BGP Routing Tables, yielding 5,107 AS nodes. Each of these AS nodes approximately maps to an ISP.
(Aggregate2): Outdegree and indegree are calculated by breaking down the directional paths that skitter collects into their corresponding links. Then, counting the number of links that start in a given AS and end in another represents its outdegree. Likewise, the number of links starting elsewhere that end up in a given AS represent its indegree.

Data Filters:
(Filter1): Remove leaf nodes.
(Filter2): Remove nodes with an out-degree of zero.
(Filter3): Remove 2-loops (two nodes with outgoing edges connected only to each other.)

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Internet Atlas Gallery

Core AS Internet

Cooperative Assocation for Data Analysis (CAIDA)
San Diego Supercomputer Center (SDSC)
University of California, San Diego (UCSD)

URL: https://www.caida.org/projects/as-core/

Visualization Thumbnail

Evaluation

Strengths:
(Strength1): By combining peering richness and geographic information, this graph clearly reveals the highly connected nature of ASes. Of the top 15 ASes, 14 are based in the U.S., and one is based in Canada. While ISPs in Europe and Asia have many peering relationships with ISPs in the U.S. there are few links directly between ISPs in Asia and Europe.

Issues:
(Issue1): Each AS headquarters reflects an administrative home, not geographical location of actual infrastructure. (which is typically national or global).
(Issue2): Graph does not reflect current conditions. More studies are needed to determine an appropriate sampling rate. (CAIDA hopes to have a daily update available by December 2000.)
(Issue3): Graph only represents forward IP topology information, with IP addresses mapped to origin ASes using a BGP routing table. Other information about peering sessions is not reflected.
(Issue4): IP layer only, does not capture lower layer (e.g., ATM, physical fiber) information.
(Issue5): Graph doesn't address any performance or workload measurements, precluding comparison of ISPs in these dimensions.

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Internet Atlas Gallery

Core AS Internet

Cooperative Assocation for Data Analysis (CAIDA)
San Diego Supercomputer Center (SDSC)
University of California, San Diego (UCSD)

URL: https://www.caida.org/projects/as-core/

Visualization Thumbnail

About the Visualization

Visualization Techniques:
(Technique1): Position of each AS is plotted in polar coordinates, position(radius,

) such that:

Key Visualization Mappings:
(Mapping1): Richer peering relationships are reflected by positions closer to the center of the graph.
(Mapping2):

represents the geographic longitude of the AS headquarters. Colored arcs at the perimeter distinguish longitudes of different continents. Names of large cities are placed at their respective longitudinal positions.
(Mapping3): Link color reflects outdegree, from lowest (blue) to highest (yellow).
(Mapping4): Certain well-known ISPs have been manually labeled.

Visualization Tools:
(Tool1) CAIDA's Otter
(Tool2) Perl script by Brad Huffaker.

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