[REN-BGP-stats-all] IPv4 R&E Routing Table Report - CERNET (R&E) view

REN Routing Table Report cscora at bgp.nsrc.org
Wed Oct 16 20:10:38 UTC 2024


IPv4 R&E Routing Table Report   20:10 GMT Wed 16 Oct, 2024

  IPv4 BGP Table (R&E) as seen at CERNET.

Report Website:     https://bgp.nsrc.org/REN
Detailed Analysis:  https://bgp.nsrc.org/REN/CERNET/

Analysis Summary
----------------

BGP routing table entries examined:                               17679
    Prefixes after maximum aggregation (per Origin AS):            9880
    Deaggregation factor:                                          1.79
    Unique aggregates announced (without unneeded subnets):       10964
    Number of IPv4 prefixes with a valid ROA:                      6927
    Number of IPv4 prefixes with an invalid ROA:                      7
    Number of IPv4 prefixes with no ROA:                          10745
Total ASes present in the Internet Routing Table:                  2594
    Prefixes per ASN:                                              6.82
Origin-only ASes present in the Internet Routing Table:            2249
Origin ASes announcing only one prefix:                            1005
Transit ASes present in the Internet Routing Table:                 345
Transit-only ASes present in the Internet Routing Table:             65
Paths with bogon ASNs present in the IPv4 Routing Table:              0
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      16
    Max AS path prepend of ASN (395156)                              12
Prefixes from unregistered ASNs in the Routing Table:                 1
    Number of instances of unregistered ASNs:                         1
Number of 32-bit ASNs allocated by the RIRs:                      45556
Number of 32-bit ASNs visible in the Routing Table:                 626
Prefixes from 32-bit ASNs in the Routing Table:                    1781
Number of bogon 32-bit ASNs visible in the Routing Table:             0
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:              2
Number of addresses announced to Internet:                    192652432
    Equivalent to 11 /8s, 123 /16s and 164 /24s
    Percentage of available address space announced:                5.2
    Percentage of allocated address space announced:                5.2
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:        2230

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                     3788
    Total APNIC prefixes after maximum aggregation:                2043
    APNIC Deaggregation factor:                                    1.85
Prefixes being announced from the APNIC address blocks:            3788
    Unique aggregates announced from the APNIC address blocks:     2420
APNIC Region origin ASes present in the Internet Routing Table:     507
    APNIC Prefixes per ASN:                                        7.47
APNIC Region origin ASes announcing only one prefix:                218
APNIC Region transit ASes present in the Internet Routing Table:     48
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         12
Number of APNIC region 32-bit ASNs visible in the Routing Table:    201
Number of APNIC addresses announced to Internet:               44591360
    Equivalent to 2 /8s, 168 /16s and 105 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-153913
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                      7959
    Total ARIN prefixes after maximum aggregation:                 4347
    ARIN Deaggregation factor:                                     1.83
Prefixes being announced from the ARIN address blocks:             7971
    Unique aggregates announced from the ARIN address blocks:      4769
ARIN Region origin ASes present in the Internet Routing Table:     1201
    ARIN Prefixes per ASN:                                         6.64
ARIN Region origin ASes announcing only one prefix:                 430
ARIN Region transit ASes present in the Internet Routing Table:     149
Average ARIN Region AS path length visible:                         4.5
    Max ARIN Region AS path length visible:                          16
Number of ARIN region 32-bit ASNs visible in the Routing Table:     203
Number of ARIN addresses announced to Internet:                83100416
    Equivalent to 4 /8s, 244 /16s and 3 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-402332
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                      3570
    Total RIPE prefixes after maximum aggregation:                 2864
    RIPE Deaggregation factor:                                     1.25
Prefixes being announced from the RIPE address blocks:             3558
    Unique aggregates announced from the RIPE address blocks:      2906
RIPE Region origin ASes present in the Internet Routing Table:      661
    RIPE Prefixes per ASN:                                         5.38
RIPE Region origin ASes announcing only one prefix:                 290
RIPE Region transit ASes present in the Internet Routing Table:     101
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          13
Number of RIPE region 32-bit ASNs visible in the Routing Table:     154
Number of RIPE addresses announced to Internet:                58577296
    Equivalent to 3 /8s, 125 /16s and 209 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-216475
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    1263
    Total LACNIC prefixes after maximum aggregation:                485
    LACNIC Deaggregation factor:                                   2.60
Prefixes being announced from the LACNIC address blocks:           1262
    Unique aggregates announced from the LACNIC address blocks:     685
LACNIC Region origin ASes present in the Internet Routing Table:    136
    LACNIC Prefixes per ASN:                                       9.28
LACNIC Region origin ASes announcing only one prefix:                57
LACNIC Region transit ASes present in the Internet Routing Table:    24
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        13
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    61
Number of LACNIC addresses announced to Internet:               4097024
    Equivalent to 0 /8s, 62 /16s and 132 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-274844 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1098
    Total AfriNIC prefixes after maximum aggregation:               140
    AfriNIC Deaggregation factor:                                  7.84
Prefixes being announced from the AfriNIC address blocks:          1098
    Unique aggregates announced from the AfriNIC address blocks:    182
AfriNIC Region origin ASes present in the Internet Routing Table:    23
    AfriNIC Prefixes per ASN:                                     47.74
AfriNIC Region origin ASes announcing only one prefix:               10
AfriNIC Region transit ASes present in the Internet Routing Table:    7
Average AfriNIC Region AS path length visible:                      3.6
    Max AfriNIC Region AS path length visible:                        6
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    7
Number of AfriNIC addresses announced to Internet:              2285824
    Equivalent to 0 /8s, 34 /16s and 225 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         590       2170     464  SINET-AS Research Organization of Informa
  1237         191         74     145  KREONET-AS-KR KISTI, KR
 58647         180         18       2  KAGAWAU-AS Kagawa University, JP
  7575         172        329     115  AARNET-AS-AP Australian Academic and Rese
 55824         132         18      19  NKN-CORE-NW NKN Core Network, IN
  4538         113       4176      70  ERX-CERNET-BKB China Education and Resear
  4621          69         37      10  UNINET-AS-AP UNINET-, TH
  4762          64          4       1  MAHIDOL-BORDER-AS Mahidol University, Tha
  2697          60          4      35  ERX-ERNET-AS Education and Research Netwo
 23570          59          5      11  INCHEON-AS-KR UNIVERSITY OF INCHEON, KR

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2152         434        507      97  CENIC-2152, US
  2920         224         44      45  LACOE, US
   376         200        162     149  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
 18558         140         18       4  NETBLK-RCOEK, US
    81         134        517      33  NCREN, US
 23024          95          7      21  OCDE, US
 21976          91         50      17  NJEDGE-NET, US
   237          85        541      50  MERIT-AS-14, US
  1736          79         16       1  MU-AS, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         283       1899     249  DFN Verein zur Foerderung eines Deutschen
   786         185       1767     182  JANET Jisc Services Limited, GB
  8895         132         24       5  ISU Internet Services Unit ISU, SA
   559         114        533     104  SWITCH Peering requests: peering at switch.c
  1103          97       1759      84  SURFNET-NL SURFnet, The Netherlands, NL
  2614          93         26      73  ROEDUNET, RO
   137          82        677      77  ASGARR Consortium GARR, IT
  1930          79         88      74  RCCN Fundacao para a Ciencia e a Tecnolog
   553          78        462      78  BELWUE BelWue-Koordination, DE
  3267          77         26      67  NIKS, RU

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         210        180      42  Rede Nacional de Ensino e Pesquisa, BR
 28391         154         10      68  Universidad Juarez Autonoma de Tabasco, M
 11340         109         25      52  Red Universitaria Nacional, CL
271640          66          8       1  UNIVERSIDADE FEDERAL DE VICOSA, BR
 61468          51          5      17  CEDIA, EC
  2715          49         99      35  Fundacao Carlos Chagas Filho de Amparo a 
 19611          48         17       2  Associacao Antonio Vieira - Unisinos, BR
 28614          38          2       2  Fundacao Universidade Regional de Blumena
  3596          37          8       4  Universidad Autonoma Metropolitana, MX
  1251          36         31      26  FUNDACAO DE AMPARO A PESQUISA DO ESTADO S

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 36914         525         82       3  KENET-AS, KE
  2018         381        319      71  TENET-1, ZA
  8094          47         48      18  PUKNET, ZA
327700          44         16       1  MoRENet, MZ
 37215          33          8       1  MAREN, MW
  6879          24          2       9  ENSTINET-, EG
 37501          11         49       6  UOFS, ZA
 36982           8         33       8  UCT, ZA
 37654           5          0       5  RwEdNet-AS, RW
 37520           3         16       3  Rhodes-Univ, ZA

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         590       2170     464  SINET-AS Research Organization of Informa
 36914         525         82       3  KENET-AS, KE
  2152         434        507      97  CENIC-2152, US
  2018         381        319      71  TENET-1, ZA
   680         283       1899     249  DFN Verein zur Foerderung eines Deutschen
  2920         224         44      45  LACOE, US
  1916         210        180      42  Rede Nacional de Ensino e Pesquisa, BR
   376         200        162     149  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  1237         191         74     145  KREONET-AS-KR KISTI, KR

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
 36914         525          522  KENET-AS, KE
  2152         434          337  CENIC-2152, US
  2018         381          310  TENET-1, ZA
  5786         197          196  UPRENET, PR
  2920         224          179  LACOE, US
 58647         180          178  KAGAWAU-AS Kagawa University, JP
  1916         210          168  Rede Nacional de Ensino e Pesquisa, BR
 18558         140          136  NETBLK-RCOEK, US
  8895         132          127  ISU Internet Services Unit ISU, SA
 55824         132          113  NKN-CORE-NW NKN Core Network, IN

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     26971  UNALLOCATED  129.111.0.0/16             276  OTS-AS-276, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-badAS

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
202.14.117.0/24      Origin:     17827  STOU-AS-TH Sukhothai Thammathirat Open U
202.14.117.0/24     Transit:      4621  UNINET-AS-AP UNINET-, TH
203.9.156.0/24       Origin:      1851  ADELAIDE-UNIVERSITY-AS-AP The University
203.9.156.0/24      Transit:      7575  AARNET-AS-AP Australian Academic and Res

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:0        /9:1       /10:1       /11:1       /12:11      
/13:18      /14:31      /15:113     /16:1902    /17:410     /18:433     
/19:538     /20:758     /21:773     /22:1351    /23:1410    /24:9923    
/25:3       /26:1       /27:0       /28:1       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 36914         504         525  KENET-AS, KE
  8895         127         132  ISU Internet Services Unit ISU, SA
  2152          40         434  CENIC-2152, US
327700          39          44  MoRENet, MZ
 23024          37          95  OCDE, US
 32440          37          64  LONI, US
  3267          35          77  NIKS, RU
 28614          32          38  Fundacao Universidade Regional de Blumenau, BR
 46115          32          35  LUTHER, US
200521          32          55  SEAP-AGE, ES

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:2         5:15        8:2        12:1        14:92       23:5      
  24:3        31:1        35:3        37:8        38:10       40:1      
  41:247      44:5        45:45       46:4        47:1        49:10     
  50:2        52:1        59:18       61:3        62:8        63:32     
  64:42       65:4        66:42       67:40       68:12       69:19     
  70:2        71:1        72:7        74:53       76:42       77:10     
  78:3        79:10       80:12       81:25       82:7        83:7      
  84:8        85:45       86:5        87:1        89:11       91:43     
  92:2        93:13       94:2        95:2        96:5        97:1      
  98:2       102:2       103:263     104:79      108:8       109:2      
 111:16      113:2       114:24      116:9       117:61      118:33     
 119:1       121:18      122:8       123:8       125:2       128:52     
 129:36      130:96      131:59      132:65      133:154     134:103    
 136:197     137:83      138:58      139:6       140:32      141:3      
 142:52      143:26      144:25      145:2       146:135     147:60     
 148:194     149:13      150:36      151:9       152:139     153:14     
 154:29      155:63      156:133     157:26      158:31      159:22     
 160:30      161:17      162:21      163:58      164:14      165:49     
 166:1       167:29      168:103     169:7       170:20      171:1      
 172:2       173:7       175:5       177:5       179:13      180:15     
 181:1       182:1       184:2       185:50      186:3       187:21     
 188:13      189:3       190:17      191:13      192:1297    193:272    
 194:139     195:75      196:147     197:315     198:501     199:239    
 200:291     201:38      202:535     203:413     204:388     205:160    
 206:206     207:282     208:66      209:132     210:123     211:3      
 212:165     213:6       216:89      217:9       218:2       219:5      
 220:17      222:1      

End of report


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